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Bubbling Witches Brew Science Experiment

Bubbling Witches Brew Halloween Science Experiment

Witches brew science expeiment - supplies:.

• ½ cup white vinegar for each colour
• ¼ to 1 cup baking soda
• Food colouring, in various colours
• 1 small container (a mini witches cauldron works perfectly)

Witches Brew Science Experiment - Instructions:

Step 1: colour your vinegar..

STEP 2: Add our magical bewitched ingredient ;)

STEP 3: Create brewing eruption!

STEP 4: Make it last longer!

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Spooky Witch’s brew science experiment {Halloween activity for kids}

There’s something special about Halloween season. Kids will love this spooky witches brew Halloween activity. They won’t even realize they’re doing a science experiment at the same time.

Use this fun and easy activity as a STEM project for classroom or at home learning. Have it as an activity at a party. Or just use it for an afternoon of witch themed fun with your kids!

This post contains affiliate links. If you make a purchase after clicking one of my links I may earn a commission at no additional cost to you.

This bubbling cauldron is a perfect STEM activity for Halloween. Kids can experiment using different combinations of ingredients and different amounts to see what results they get.

This activity can get quite messy. You’ll want to put a baking pan underneath and/or do it outside, on a tile floor, or in the bathtub. Basically, somewhere you can easily wash away the mess when your kids are all done creating!

Witch potion making supplies

• 1/2 cup white vinegar (for each color)
• 1/4 to 1 cup baking soda
• Various colors of food coloring
• Witches cauldrons

Make sure you have extra supplies on hand. My daughter had a blast doing this project and wanted to do it again and again! We went through 2 bottles of vinegar before I finally called it a day.

How to make your bubbling witch’s cauldron

1 – Mix vinegar and food coloring in small cups (separate cup for each color)

2 – Pour baking soda into the cauldrons (or whatever container you want to use for the explosion/reaction). Start with about a teaspoon.

3 – Pour one color of vinegar over the baking soda and watch your witch potion brew!

4 – Stirring it a bit will create a bigger eruption.

You MUST mix these in an open container. If you mix them in a container with a lid they could explode the container.

Learning Opportunities

This activity is a great introduction to basic science. They can try lots of different things and see which works the best and creates the best witch potion.

Try different amounts of baking soda

How do you make a bigger eruption? Does more baking soda make a difference? Does how fast you poor in the vinegar make a difference? How about stirring?

Try other items

Let them try different substances to see if they’ll create a reaction. What happens if you replace baking soda with salt, sugar, coffee, etc.

Do not mix your vinegar with bleach or hydrogen peroxide (not that I think you’re likely to let your kids experiment with those.)

To be safe do a quick Google search for the items you want to mix with vinegar to ensure they won’t cause any safety issues.

You can also do the reverse and try pouring other liquids over the baking soda to see if they react. As before, make sure your combinations aren’t going to cause any issues.

Try making a rainbow

Try to make a rainbow potion. We achieved it a few times by dropping food coloring on the dry baking soda, 3-4 colors in different areas of the baking soda.

Then pour the vinegar over top and we actually saw the colors come out separately, it was cool to watch.

Have fun! We’d love to see your witch potions. Share a photo below or tag us on Instagram @totschoolresources

Check our Halloween page for more crafts & activities!

Halloween witches brew

Thanks for sharing!

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Witches Brew Halloween Science Experiment + Worksheets

Kids will have FUN with this EASY science experiment as they make witches brews, LEARN chemical reactions, and EXPLORE colors. Learn how to make extra…

Kids will have FUN with this EASY science experiment as they make witches brews, LEARN chemical reactions, and EXPLORE colors.

Learn how to make extra bubbly witches brews with our special ingredient, have fun color-mixing, and experimenting with acids and bases with this fun Halloween project.

Thank you for visiting. This post may contain affiliate links to recommended products at no extra cost to you. Read our Disclosures and Terms of Use . Don't miss out again, become a  Reader here <--it's FREE. 

The baking soda and vinegar reaction is one of the best at-home science experiments that simply requires two basic items from the kitchen, mixing them together, and watching your kids be amazed at the results!

All of my kids LOVE this activity starting with my oldest child (Little Tiger, age 10) to my middle child (Little Dragon, age 8) to my youngest child (Little Puppy, age 3). We have done it for years now and it never gets old, I think it must be considered a Halloween tradition in our house now.

You can do this science experiment on it’s own, or INCREASE LEARNING with our EASY to use: WITCHES BREW HALLOWEEN SCIENCE PACK .

Each Science Pack is created to:

• Make doing the activity EASY for you!
• Enhance LEARNING for your kids!
• Be ready to PRINT , PREP , and Do !
• PRINTABLE ADD-ONS
• VIDEO EXAMPLE (When available)

Witches Brew Recipe Cards

Witches Brew Lab Worksheets

Don’t see the box?  CLICK HERE   to be directed to the download.

Witches Brew Halloween Science Experiment

If you like our Witches Brew Halloween Experiment I would love for you to PIN IT! It helps you save it for later and others discover it too, which lets us bring you more AWESOME CONTENT like this .

• White Vinegar
• Baking Soda
• Liquid Food Coloring
• Mini Cauldron (s) or Small Bowl(s)
• Glitter and/or Mini Halloween Toys
• Dish Soap for extra bubbles

Directions:

You can watch our short tutorial video or read the directions below.

Have children select which color spell they want to make. Spell Recipe Cards are included in the Printable Science Kit.

Have the children put a spoonful of Baking Soda in the cauldron.

Have children put Food Coloring into the cauldron.

Optional: Have children add 2-3 drops of Dish Soap.

Optional: Have children add glitter or small Halloween toys in the cauldron.

If the spell does not “bubble” up, add more vinegar, and/or stir the ingredients together.

MORE TO ENJOY:

The Best Kids Ideas for Halloween

Halloween Quesadillas

5 Little Pumpkins Craft

GET OUR LATEST UPDATES!

Witches’ Brew Fizzy Cauldrons: Halloween STEAM Experiment

• Kindergartner
• Preschooler

Witches’ brew fizzy Halloween STEAM experiment is a great way to bring science and Halloween together over a bubbling cauldron! This simple to set up STEAM idea is the perfect activity for home or in the classroom this Halloween. So put on your witches’ hat and test out your best cackle for this fun Fall science idea!

Witches’ Brew Fizzy Cauldrons: Halloween STEAM

Creating a witches’ brew experiment at home is one of those super easy kitchen science experiments, every child should experience especially during Halloween. When I set this up for my kids, they absolute loved it. Baking soda fizzy experiments are always a massive hit on our house. The colours, the smells, the sounds and the bubbles! This fun and easy chemical reaction was equal parts science and sensory!

Science for All Ages

One of the great things about this activity is that its safe for toddlers and preschoolers but exciting enough to entertain older grade school age kids as well! The main ingredients for this chemical reaction are baking soda and vinegar, common kitchen household items that is easily available at the grocery store.

Easy Fizzy Baking Soda and Vinegar Experiments

Do you want to try more experiments with baking soda. You can also try our other fizzy experiments like our

• Awesome Fizzy Ice Cream Shop Sensory Bin
• Fizzy Sun Sensory Bin: Summer STEAM
• Super Fun Fizzy Paint Easter Bunny Craft
• Fizzy Shapes Sensory Bin
• Love Potions Sensory Bin: Valentine’s Day STEM
• Easy Baking Soda and Vinegar Experiment for Kids
• Lemon Volcanoes
• Fizzy Apple Volcanoes

Science Behind the Witches’ Brew Fizzy Cauldrons: Halloween STEAM Experiment

What happens when you combine baking soda with vinegar? Fizz ! But why does this happen with two seemingly common ingredients. Baking soda is a base and vinegar is an acid. When an acid and a base mix they produce a gas called carbon dioxide.

How to Make the Witches’ Brew Fizzy Cauldrons: Halloween STEAM Experiment

• Grab black plastic witches’ cauldrons. Find a link to purchase them in the supplies section below.

• Add some baking soda to the cauldrons. The exact measurements aren’t needed. Making it the perfect activity for toddlers and preschoolers. Invite them to spoon in the baking soda – 2-4 spoon fulls are good but more or less is ok too.

• Add several drops of green, purple, orange or black food colouring in each cauldrons, respectively, deepening on how many you have. To make the explosion larger and foamier, add few drops of bubble bath to the cauldrons as well. Again the exact measures aren’t needed. The more bubble bath you add the larger the reaction so be prepared!

• Fill a squeeze bottle with vinegar. You can mix in some water in order to make your vinegar go further. Mix 1/3 water with 2/3 vinegar.

• Squeeze the vinegar into the cauldrons and watch it erupt with green, orange purple or black bubbling brew! My kids loved this part!!

How the Played

My kids adored loved this idea (as they do with all the fizzy activities we do) they honestly can’t get enough! I let me kids add all of the ingredients so they added lots and lots of bubble bath. The result was a massive foamy bubbly brew erupting on our tray. They of course got their hands in there at the end of the experiment when all the vinegar was exhausted. Because every good witch knows sometimes you have to mix those ingredients by hand!

Looking for more Halloween Activities? Check out these fun ideas:

• 50+ Halloween Activities for Kids
• 40+ Halloween Sensory Bins
• 20+ Halloween Sticky Walls
• 30 Adorable Pumpkin Activities & Crafts
• 25+ Pumpkin Painting Ideas for Kids
• 31 Adorable Toddler Halloween Costumes
• 19 Halloween Sticker Activities
• 20 Cool Ghost Activities & Crafts
• 20 Witch Crafts & Activities for Kids
• 40+ Spider Crafts & Activities for Kids
• 20 Haunted House Crafts for Kids
• 24+ Skeleton Crafts & Activities for Kids
• 20+ Bat Activities & Crafts for Kids

Age Suitability

This activity is good for toddlers, pre-k, kindergarten aged children 2 years old and up. My kids are 4.5, 4.5 and 8 years old.

The mess level for this activity is HIGH.

Difficulty to Create 

Skills developed.

Sensory play, language development, number recognition, color recognition, hand-eye coordination, fine motor skills, imaginative play, creativity.

The benefits of sensory play:

• encourages the development of fine and gross motor skills;
• supports language development;
• can calm and relieve anxiety;
• promotes and strengthens memory; and
• helps develop the nerve connections the brain requires for higher learning.

Supplies 

(This post and list contains affiliate links for your convenience. If you make a purchase using one of these links, I may earn a commission. Please visit my  disclosure policy  for more information.)

• Tray or sensory bin
• Witches cauldrons
• Baking soda
• Food colouring
• Bubble bath

Books, TV Show & Play Kits!

Book:  exciting sensory bins for curious kids.

Did you know I wrote a book of sensory bins? Click here for more information  Exciting Sensory Bin for Curious Kids . Or grab your copy at  Amazon . 

Engage your child in hours of play with my colorful collection of over 60 sensory bin activities, recipes and play projects that aid with memory formation, language development, problem-solving skills and more. Perfect for toddlers from eighteen months to three years old and beyond, each bin makes use of materials you already have at home and helps reignite your kids’ interest in toys long forgotten.

Boring afternoons are made exciting with awesome animal-based bins, like Salty Shark Bay or Yarn Farm. Pretend play bins like Birthday Cake Sensory Play or Bubble Tea Party encourage creativity and imagination. And your kids will have so much fun they won’t even know they’re getting smarter with STEAM (science, technology, engineering, art and math) activities like Sink or Float Soup, Magnetic Letter Hunt or Ice Cream Scoop and Count.

With setup instructions, details on how to guide your child through each activity, suggestions for what to talk about with your child as they play and other useful tips, Mandisa gives you all the information you need for creative sensory activities your kids are bound to love.

Designed for toddlers 18 months and up.

Book:  Super STEAM Activity Book for Kids

Learning all about science, technology, engineering, art, and math sets kids up for scholastic success―and it can be so much fun! Watch kids enjoy building STEAM skills as they color friendly fish, help water find its way to tree roots, solve math problems with mazes, and more. 

Find out more and grab your copy  here .

Designed for preschoolers 3 years old and up.

Book:  Big Book of Riddles for Kids

Riddle me this: What’s an exciting way to practice critical thinking while having a blast?  The Big Riddle Book for Kids , of course! From hilarious puns to tough brain teasers, kids can build problem-solving skills with hundreds of riddles that show them how to think outside the box.

• 350 riddles for kids —Have hours of fun with riddles, puns and jokes, and math and logic puzzles that’ll get their wheels turning!
• Level up their skills —Riddles get trickier as kids progress through the book, challenging them as they get better at solving puzzles!
• Double-check their work —Kids can check their answers in the back of the book with a handy answer key.

Help children expand their minds while having fun with this puzzle book for kids!

Designed for kids ages 6 years   old and up.

TV Show:  Curious Crafting

I’m so excited to finally share my new crafting TV show  Curious Crafting  which launched July 1 at on  TVOkids  and  TVOkids YouTube !

Set in the ultimate crafting space, Curious Crafting is a short form pre-school age series about the joy of making crafts. I lead a rotating cast of adorable little preschoolers (including my own) making magic out of common household objects.

In each episode we transform recycled items into magical crafts like a milk carton school bus, paper bag puppet or cotton pad turtle. The crafters learn and laugh their way through each activity while demonstrating what their young imaginations can create. 

Curious Crafting shares the adventure and joy of making art with takeaway lessons for creating crafts at home.

This show designed for toddlers and preschoolers 2.5 years old and up. 

The Best  Sensory Play Kits  for Kids

Play is at the core of learning during the early years and it can take many forms. One of the most important of these is  sensory play  because it engages all of a child’s senses (taste, touch, smell, sight and hearing) and has a enoumous positive impact on brain development.

Our Sensory Play Kits are some fun and easy ways to keep your child engaged while at the same time using sensory play to nurture their mind!

Shop our ready made play kits  here .

WILL YOU MAKE A WITCHES’ BREW FIZZY HALLOWEEN EXPERIMENT WITH YOUR KIDS? PIN IT FOR LATER!

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Witches Brew Science Experiment With Kids

Would you like a great way to get your kids excited about STEM this Halloween? This Witches Brew Science Experiment is sure to be a hit!

Double double, toil, and trouble. Halloween is such a fun holiday for kids because it really ignites their imagination. One of the most quintessential Halloween characters is, of course, the witch. You can just imagine the witch in the middle of the forest, mixing up her potions and witches brew.

Only you don’t have to just imagine it. You and your kids can actually make some witches brew of your own! This is a fantastic STEM activity to do with your kids and it will totally get them excited about science.. and about Halloween!

The fun thing about this witches brew science experiment is that it is ridiculously easy to create but the effects will have everyone oooh-ing and awe-ing. 

Sunshine Whispers participates in the Amazon Associates and Amazon Influencer Programs. As an Amazon Associate we earn from qualifying purchases. We may earn money or products from the companies mentioned on this site and in this post.  

What you will need to do the Witches Brew Science Experiment:

• ½ cup white vinegar for each color
• ¼ to 1 cup baking soda
• Food coloring, in various colors (make sure to try purple, green, blue, orange, and red!)
• Caudron Kettles ( you can pick some up from Amazon )
• Small cups to mix the vinegar and food coloring
• A spoon for the baking soda
• Optional: a tray or cookie sheet to contain the mess… because this science experiment will get messy

This witches brew science experiment is totally safe for kids. None of the ingredients are toxic, even if kids somehow end up swallowing some of it. But this activity has a defintie mess factor.. especially if you are doing it with younger kids.

Unless you want stained clothes, I would have kids put on a smock or old clothes before doing this activity.

How to conduct this experiment:

1. In individual cups, mix food coloring with vinegar.

2. Add baking soda to the cauldron or whatever container you have.

3. Pour one color of vinegar over the baking soda and watch the eruption.

4. To create a more continuous eruption, stir the baking soda with a popsicle stick or spoon as more vinegar is added.

The Science Behind it!

When you mix baking soda with vinegar, a chemical reaction is created because baking soda is a base and vinegar is an acid. When you mix them the chemical reaction makes CO2. This gas is lighter than air, so it causes the mixture to rise. And then the liquid of the vinegar mixture traps the gas bubbles.. which causes the mixture to bubble and foam over the sides of the contain. And there you have your witches brew!

If you want to add an educational component to this fun activity, you can ask your kids to come up with a theory about what they think will happen before you add the vinegar to the baking soda. Also, the kids can mix up how much baking soda you add to the cauldrons.. or even how much vinegar you pour into the baking soda. 

Check Out These Science Experiments Too!

• Spooky Science Experiments for Kids
• 20 Candy Science Experiments
• Apple and Pumpkin Science Experiments 
• 20 Science Experiments That Are Basically Magic
• 20+ STEM Challenges That Use Simple Materials
• 4 Fun Kitchen Science Experiments to Conduct This Summer
• 15 Amazing Spring Science Experiments
• Edible Slime Recipes 
• Slime Recipes with 4 Ingredients of Less
• The Best Electricity Science Experiments for Kids

Hi! If you love to have fun with your kids and explore, create, travel, laugh, and love.. you have come to the right place! Follow along to get great tips for fun in Maryland, family travel destinations, and other family fun ideas!

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Witches Bubbling Discovery Brew

Will you dare to plunge your hand into the bubbles to see what “surprises” lie beneath them in our Witches Bubbling Brew?

Witches Bubbling Discovery Brew Recipe

This post contains affiliate links for your convenience.

• Ghoulish Eyeballs
• Spaghetti Rats Tails
• Dinosaur bones
• Spooky spiders
• Water bead fish eggs

How to make Bubbly Witches Brew

• Put all of the ingredients into a large bowl.
• Add a dash of washing up liquid (dish soap).
• Fill half way with warm water.
• Pop in a straw and blow bubbles until all of the ingredients are hidden beneath the bubbles.

Hiding the ingredients under the bubbles add another level of spooky Halloween fun to this sensory activity. Prepare yourself for the squeals of delight when you show it to your kids!

Exploring the Witches Bubbling Brew

I set the bowl down in the centre of the table on top of a towel. I then asked each of my children in turn to find one of the ingredients by searching through the bubbles with their hands. This resulted in lots of squealing and giggling as they searched and stumbed against the different materials and textures.

Activity Extension Ideas

• You could make this activity even spookier by adding in some food colouring to turn it a different colour.
• Vary the contents to make them more or less spooky depending on your own children’s tastes.
• Make some bubble pictures along the way as well by placing a sheet of paper down onto the bubbles during the activity, if you have added in some food colouring.

What ingredients would you add in to your “Witches Brew”?

You might also like:

10 halloween stem activities, spooky sensory bin, spooky writing with stickers.

46 thoughts on “Witches Bubbling Discovery Brew”

Love this! Perfect Halloween sensory play. Pinned!

It has so many possibilites Totschooling we'll definitly be brewing up some more recipes!

This is just perfect for Halloween – great idea!

Thanks Emma! My boys are so excited for Halloween already so we had to get started on our activities!

oh my girls would love this activity! really nice!

thank you for linking up with the #pinitparty

Thanks hope you get chance to have a go at it!

Brilliant!! Great idea for Halloween!

Thanks! It's great as well as you can add in whatever your kids like as well.

Love this idea for some seasonal sensory fun. I really want to introduce my children to water beads. #pintorials

Water beads are brilliant in shaving foam as well you have to try that with them!

This is a grossly awesome idea ~ thanks! #Pintorials

Thanks! It's just gross enough to please my kids aged 6 and under there were lots of "urrgghhhs" going on!

Such a lovely activity, sounds so much fun! Xx #letkidsbekids

Thanks it was great fun to do!

This looks fun! My kids would love just the bubbles! Lots of variations to try, too 🙂

My daughter was in hysterics blowing the bubbles. She just kept wanting to make more and more!

This is amazing! Looks like they had alot of fun! #MMWBH

They had a fab time with this one! Definitly one of our favourites so far!

This looks like SO MUCH FUN! Mums are allowed to play too…right? lol! I think this has to be done in our house! Thanks so much for sharing with #MMWBH xx

http://www.superbusymum.net

Mums are definitly allowed to play Deborah i enjoyed it nearly as mcuh as the kids did!

My boys would love this! X

I hope you get chance to have a go as it was great fun.

A disgustingly fabulous activity, perfect for Halloween.

Thank you! We just cannot wait for Halloween!

What a fab idea. I bet that was fun. I think my 3 would love it, I might just have to try something like that. Thanks for linking #LetKidsBeKids

I d definitely recommend giving it a try!

Love this idea! I can only imagine how my son will react to those textures!!

It was really fun watching my kids pulling out the different things. It's amazing how by giving something ordinary a different name can change their perspecitve on how it feels etc.

Ooohhh! We need to try an activity like this!

It's a great on to have prepared in advance and then just bring it out once you are ready for it.

This looks awesomely gross! I'm totally doing this with my kids 🙂

What a fun idea!

What a fab idea! My mind is whirring now for Halloween parties… 😀 x

Halloween is a great time for so many fun arts and crafts activities it's one of my favourite times of the year.

Too much fun! Thanks for linking up to #brilliantblogposts, please add my badge or link back if you an x

Thanks. Just added your badge now!

This is brilliant I love it definitly going to try this out on halloween, thank you for linking up xx #batcraftcrazy

Thanks! Enjoy if you do have a go. This post has been my most popular so far so i m delighted we wrote it up now!

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Bubbling Brew for Pretend Play

October 20, 2023 By Kate 2 Comments This post may contain affiliate links. I may receive commissions for purchases made through links in this post at no cost to you.

Bubbling brew is a playful, fizzing science activity preschoolers will love. They can pretend to be witches or wizards whilst they stir up a magic, fizzing brew filled with plastic bugs!

We originally did this one afternoon with my youngest when she was a preschooler (how time flies!). It kept her busy for AGES and it was something she kept requesting to do again and again for years afterwards – who doesn’t love fizzy science?

It’s very messy, but oh-so-fun.

This creative play idea was first published in 2014 and has been updated and reshared for today’s audience.

You might also like our Halloween pom pom poppers

Bubbling brew is super easy to set up at home, likely with ingredients and props you already have on hand.

You will need plenty of vinegar and baking soda, because the kids will love it so much they will use it all up quick.

This activity is a bit of science and a bit of pretend play rolled in to one. You can talk to the kids about how the acid in the vinegar reacts with the alkaline in the baking soda to cause a bubbling, fizzing reaction. Just like magic!

Miss K was always a fan of pretend kitchen play, so this was something I knew she would really love.

Lets make some…

How to make bubbling brew for pretend play

You will need:.

• 2L bottle of white cleaning vinegar (or the cheapest vinegar you can buy) • Baking Soda (we used about half of a 500g box) • Food colouring or liquid water colours (food colouring stains hands and clothes so liquid watercolours are a better choice) • Plastic creepy crawlies and snakes • Props from the kitchen: A large pot, a wooden spoon, a table spoon, bowls and a measuring jug • Water

To make the bubbling brew first pour 4 cups of water into the large pot, and stir in 3 heaped tablespoons of baking soda. Then add a few drops of food colouring and the plastic creepy crawlies.

Give it all a stir and then add vinegar. Miss K poured the vinegar into the measuring cup herself and then poured it all into the brew.

We had some awesome fizzing reactions!

You can keep adding tablespoons of baking soda and cups of vinegar as much as you like. Miss K used up all of the 2L bottle of vinegar and also finished off the box of baking soda which was about half full to begin with. I’m sure she would have kept going much longer if she could have!

Once the supplies were all gone she made a great game of serving the “poison stew”, as she called it, into plastic bowls for pretend dinners. This kept her busy for a good half hour after our activity was over – she really didn’t want me to pack it away.

You might also like:

• Check out our collection of Halloween paper crafts for kids
• This spooky pom pom popper is a fun and easy DIY toy 
• Salt dough is a classic for a reason! We used it to make Halloween salt dough ornaments
• Kids will love making a witch’s potion with all sorts of ingredients!
• Make a cute and fluffy pom pom spider  

September 30, 2019 at 9:32 am

I have two young friends who will enjoy making this for Halloween!

September 30, 2019 at 11:08 am

I hope they have fun 🙂

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I’m basically a big kid who never grew up and still loves to muck around with paint, glitter, glue and toilet rolls. With the crafts shared here on this website I’m hoping to give other parents and carers inspiration to get crafty with their kids at home – make our projects, or use them as a source of inspiration to spark ideas of your own. When it comes to crafting no rules apply!

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10 Magical Harry Potter Science Experiments & STEM Activities

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Make your little muggles feel like wizards with these  10 magical Harry Potter STEM activities !

Kids all over the world love all of the witchcraft and wizardry involved in Harry Potter! So, what could be better than teaching children the magic of learning through STEM than Harry Potter himself?!

10 Magical Harry Potter Science Experiments & STEM Activities

Prepare a Harry Potter novel study complete with bubbling cauldrons, circuit wands and magic tricks using Harry Potter science experiments! Then, hop over to our Author Unit Studies page to pick up a free printable pack of reading and writing activities to learn all about JK Rowling!

1. Amortentia Love Potion  from Babble Dabble Do

2. arithmancy math  from teach beside me, 3. bubbling brew experiment  from little a bins for little hands, 4. glowing secret message  from teach beside me, 5. golden snitch catapults  from science sparks, 6. harry potter circuit wands  from steam powered family, 7. harry potter potion slime making activity  from little bins for little hands, 8. harry potter potions class experiments  from imagination soup, 9. revelio charm  from babble dabble do, 10. wingardium leviosa  from steam powered family.

Where to go next?

• Create a Unit Study with our Free Printable Author Study Pack
• Hands-on Engineering Activities for Kids
• 12 Screen-Free Technology Projects
• LEGO STEM Activities for Kids

Ashley helps parents who want to homeschool find the resources they need to successfully teach their children. Ashley is a former teacher, current homeschooler, published author, and designer behind Circle Time with Miss Fox printables as well as the creator of this website, The Homeschool Resource Room.

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Double, double toil and trouble… it’s time to make a cauldron bubble! Explore chemistry with your little witch or wizard as you create your own spooky science experiment.

• Cauldron (or bowl)
• Baking Tray
• Baking Soda
• White Vinegar
• Food Coloring (of your choice)
• Glitter (optional)
• Plastic Eyeballs (or any other creepy “ingredients”)

Place your cauldron on your baking tray, making sure the tray has a little bit of a lip to catch any wayward witch’s brew. Fill your cauldron about a third of the way with your white vinegar. Add a few drops of your food coloring then mix in a healthy squirt of dish soap. Now, it’s time to get creative! Add glitter and other creepy “ingredients” to your brew to make it extra spooky. When you feel like it’s just the way you want it, pour in a heaping tablespoon of your baking soda and watch your cauldron bubble before your eyes!

The Science

This experiment explores two very important chemical reactions – an acid-base reaction and a decomposition reaction. The acid-base reaction happens when your white vinegar (acid) is combined with your baking soda (base). When baking soda (sodium bicarbonite) and the acetic acid in your vinegar are first combined, they create carbonic acid and sodium acetate. This is when the second reaction happens! The carbonic acid creates a decomposition reaction as it begins to break down into water and carbon dioxide gas – creating your boiling, bubbling brew! Learn more»

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Bubbling Fizzy Cauldron STEM

Bubbling fizzy color-mixing cauldron acid-base science experiment to promote STEM education in toddlers, preschoolers, and kindergartners. Video Tutorial is Included.

Whether we are looking for a Leprechaun’s pot of gold at the end of the rainbow or brewing a colorful potion, make this Bubbling Fizzy Cauldron STEM experiment with a few simple household ingredients! Besides, by skipping dish soap, this science experiment is safe for babies and toddlers who are still mouthing objects! Most importantly, this kid-safe taste-safe color-mixing activity is perfect for all ages and will expose little scientists to the most satisfying-to-watch acid-base reaction.

Here is a list of supplies you’ll need for Bubbling Fizzy Cauldron STEM:

• a waterproof tray to catch the spillover
• a sensory filler (we are using recyclable shredded grass )
• baking soda and a scoop (love this olive-wood scooper )
• food coloring
• cauldrons , bowls, or cups

Instructions

Below are the instructions on how to conduct this taste-safe Color-Mixing Science Experiment:

First, set up your waterproof tray to catch the spillover. (Grass filler is optional.)

Secondly, arrange cauldrons and add a heaping amount of baking soda to each.

Next, add the desired food coloring to each cauldron’s baking soda. Next, MIX baking soda and food coloring. (You want the food coloring to ‘coat’ and mix with baking soda so that the eruption is colorful.

If you do not mix it, the vinegar might activate with baking soda that has not been ‘colored’, and you will have a colorless eruption.)

Lastly, pour vinegar over the baking soda cauldron, and watch the bubbling fizz erupt!

Video Tutorial

Instead of vinegar, you can use lemon/ lime juice/concentrate or freshly squeezed citrus.

TASTE-SAFE STEM

This bubbling fizzy cauldron STEM experiment is TASTE-SAFE for little ones who are still mouthing things since they are using basking soda and food coloring! However, taste-safe does NOT mean edible!

Please note you can add a squirt of dish soap. However, your experiment will NO LONGER be TASTE-SAFE!

We still want to deter little ones from eating anything that is not food! Good habits will ensure SAFE play! So, if they put it into their mouth, calmly say, “No, not for eating. Not in your mouth.” or “Do not put it in your mouth. This is not food.” Or stick a tongue out and make a yucky /disgusted face. Most importantly, model appropriate ways to play. If the behavior persists, remove it and introduce it later.

The best part of this experiment is that you can conduct it multiple times! Since when you pour vinegar over the baking soda, the vinegar will only activate the top layer of it, leaving the bottom layer intact.

So, try after your first eruption, add more vinegar, and watch it fizz again! If you pour the vinegar and nothing happens, add more baking sade!

COLOR MIXING STEM

This STEM is also a fun color mixig experiment!

Mix blue + yellow to make green.

Mix blue+ red + (optional pink) to make purple.

Primary and Secondary Color Mixing PDF Freebie

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Bubbling Fizzy Cauldron STEM VARIATIONS:

• Set 7 cauldrons and add rainbow colors to each
• For Halloween, add spooky eyeballs or other accessories into the cauldron
• Harry Potter or witches fans? Make it a brewing potion!

What’s the science behind Bubbling Fizzy Cauldron STEM?

It’s chemistry! It’s an acid-base reaction! This taste-safe Color-Mixing Science Experiment is simple. It’s fun! And it never ceases to amaze little people!

When baking soda (a base) and vinegar (an acid) are mixed together, they react with each other because of an atom exchange. (Baking soda receives a proton from vinegar). And one of the products this reaction creates is carbonic acid  which is very unstable. Thus , carbonic acid   instantly breaks apart into  water  and  carbon dioxide molecule. And since the carbon dioxide molecule is now free of its other chemical bonds, it can escape , bubbling forth as a gas. As a result, this chemical reaction releases  gas  that bubbles and fizzes, making it a fun sensory acid-base kids’ experiment. The food coloring helps you see the bubbles a little better.

So, in a nutshell, it is the CO2 gas that is responsible for all the fizzing as the gas escapes the solution!

A few discussion questions you can ask your kids to think about with Bubbling Fizzy Cauldron STEM:

• What would happen if you added coloring to vinegar instead of baking soda? (Hint: Same result, but you can skip mixing baking soda with coloring.)
• What if we changed how we added the ingredients together? For example, if we poured the baking soda into the vinegar instead of the other way around? (Hint: Same result, since it the MIXING of ingredients that matters and not the order).
• Can this potion be used for anything? (Hint: Baking soda and vinegar make a great household cleaner!)

Have you tried Potion Color-Mixing Science Experiments?

Leave a comment on whether you liked this bubbling fizzy cauldron stem, for more acid-base reaction stem …, see here balloon baking soda vinegar kids science..

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Bubbling Halloween Slime – Hocus Pocus Slime Making Fun for Kids!

The evil witches of Hocus Pocus would easily love this bubbling Halloween slime recipe ! If you are looking for a spooky good time with a family friendly movie theme, our bubbling, fizzing, erupting cauldron of oozing slime is perfect! This incredible homemade slime recipe is easy to make and a hit with the kiddos any time of the year, but who doesn’t want to mix up spell binding potions once in a while.

BUBBLING HALLOWEEN SLIME RECIPE 

You will be taking Halloween slime making to a whole new level of slimy awesome-ness!

You are definitely going to want a cookie tray to catch this bubbling and fizzing “potion” . Hands down, this is the best slime making fun we have had together. Why is that?

Because we love anything that fizzes, bubbles, and erupts . This bubbling slime has the definite oooh and aaah factor , but is also super easy to set up. A little messy, this bubbling Halloween slime is going to be a big HIT this season.

Turn on the movie Hocus Pocus and get set to for your own witch’s or wizard’s brewing station. You choose the colors and creepy crawlies.

Plus you get a fun, stretchy slime out of the science experiment! We used our classic saline solution slime recipe with a bit of a twist…

BUBBLING HALLOWEEN SLIME

Honestly, what’s not to LOVE about this bubbling cauldron of slime, and I can’t wait to share with you how to set it up…

The recipe instructions and mixing are different then all our other slimes, so I recommend you read through the directions, tips, and tricks before you get started. As always the right slime ingredients paired with the BEST slime recipes is key!

Note: The slime that is produced is fun and stretchy but definitely is not as high quality as our original slime recipe. Of course, making the bubbling, fizzing slime is half the fun. If you want a super awesome stretchy slime without a volcano, check out the original saline slime recipe here .

HALLOWEEN SLIME SCIENCE

We always like to include a bit of homemade slime science around here! Slime is an excellent chemistry demonstration and kids love it too! Mixtures, substances, polymers, cross-linking, states of matter, elasticity, and viscosity are just a few of the science concepts that can be explored with homemade slime!

What’s slime science all about? The borate ions in the slime activators  (sodium borate, borax powder, or boric acid) mix with the PVA (polyvinyl acetate) glue and forms this cool stretchy substance. This is called cross-linking!

The glue is a polymer and is made up of long, repeating, and identical strands or molecules. These molecules with flow past one another keeping the glue in a liquid state. Until…

You add the borate ions to the mixture,  and it then starts to connect these long strands together. They begin to tangle and mix until the substance is less like the liquid you started with and thicker and rubbery like slime! Slime is a polymer.

Picture the difference between wet spaghetti and leftover spaghetti the next day. As the slime forms, the tangled molecule strands are much like the clump of spaghetti!

Is slime a liquid or solid?

We call it a Non-Newtonian fluid because it’s a little bit of both! Experiment with making the slime more or less viscous with varying amounts of foam beads. Can you change the density?

Did you know that slime aligns with the Next Generation Science Standards (NGSS)?

It does and you can use slime making to explore states of matter and its interactions. Find out more below…

• NGSS Kindergarten
• NGSS First Grade
• NGSS Second Grade

Of course, there is an additional science experiment going on here which is the chemical reaction between the baking soda and the vinegar. When the acid and base mix together, they produce a gas called carbon dioxide. This is seen in the fizzing bubbling eruption that takes place when you stir the slime! Continue to explore states of matter too!

BUBBLING HALLOWEEN SLIME INGREDIENTS

Read more about our RECOMMENDED SLIME INGREDIENTS here.

• 1/2 cup Elmer’s Washable White School Glue
• 1 tbs Saline Solution
• 2 tbs Baking Soda
• 1/4 cup White Vinegar
• Food Coloring (green or any Halloween colors you want!)
• Small Cauldron or Container (for mixing slime)
• Small Cup (for mixing vinegar and saline)
• Cookie or Craft Tray
• Creepy Crawlies

SLIME TIP #1:

When looking for a good container for your fizzing slime volcano, find something that is on the taller side but with a wide enough opening to allow you to easily mix the slime as well. The nature of a baking soda and vinegar volcano is that the gas produced during the reaction pushes up and out. A taller and narrower container will yield a better eruption compared to a wider and shorter container.

We chose a small black 5″ cauldron for the theme of the slime!

BUBBLING HALLOWEEN SLIME INSTRUCTIONS

STEP 1: Start by combining the glue and baking soda in your chosen container. You will notice that as you stir the baking soda into the glue it thickens! This is really the point of adding baking soda to saline solution slime recipes.

Go ahead and get witch-y! Throw in all sorts of creepy crawlies!

SLIME TIP #2: Experiment with different amounts of baking soda!

STEP 2: For our bubbling Halloween slime we used green food coloring. Orange and purple would be fun too!

Step 3: In another small container, mix the vinegar and the saline solution.

SLIME TIP #3: You can also play around with the amount of vinegar you use for another way to set up a slime experiment!

Step 4: Pour vinegar/saline mixture into the glue mixture and start stirring!

You will notice the mixture begin to bubble and eventually erupt everywhere! This is the reason for the tray!

Step 5: Continue to stir until the eruption is complete. You will notice that it gets harder and harder to stir because you are mixing your slime as well!

Once you have stirred as much as possible, reach in and pull out your slime! It will be a bit messy at first but this slime is wonderful! All you need to do is knead it a bit.

SLIME TIP #4: add a few drops of saline to your hands before you reach in for the slime!

It should not be sticky on the hands either! But if after kneading your slime it still feels sticky, you can add a drop or two of saline to it and continue to knead. Don’t add too much or you will end up with a rubbery slime!

Go ahead and play with your bubbling slime!

Want more Halloween Science Experiments, click here

What can you do with the leftover slimy eruption on the cookie sheet? You can actually play with it too! We added a squirt of saline to it and had some fun messy slime play. It makes a great popping sound when you squeeze it due to all the bubbles from the reaction that are left over!

YOU MAY ALSO LIKE: Bubbling Brew Experiment

As I mentioned above, the slime that is created along with the bubbling Halloween cauldron is not necessarily something that will save for weeks. We found it got a bit watery and not as nice the next day.

Check out even more amazing Halloween slime recipe ideas.

More Fun Things To Do This Halloween

• Halloween Science Experiments
• Halloween STEM Activities
• Halloween Art Projects, and Crafts Too!
• Halloween Board Games  

Printable Halloween Slime Pack

Everyone’s favorite slime with special themes is just right for your kiddos! Plus, your kids will get to apply extra hands-on learning through writing, science, and math activities.

• Easy to follow basic slime recipes  for fluffy slime, borax slime, liquid starch slime, and saline solution slime.
• Fun Halloween-themed slime recipes  for extra creative slime time!
• Combine slime and math  with easy-to-use printable sheets.
• Find fun ways to  experiment with slime science  including science information and key vocabulary.
• Fun  slimy theme activities  perfect for centers, early finishers, or classroom party time!
• Perfect for parties and groups!

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