Halloween is almost here and it’s time to get spooky! This Bubbling Witches Brew Experiment is the perfect STEM activity for preschoolers to get ready for Halloween! Made like a traditional volcano experiment, this Halloween version is so much better than regular volcanoes. This experiment is perfect if you’re looking for STEM activities, Halloween STEM activities, or Halloween activities.
And, if you want more Halloween fun, try this haunted house tray where kids can decorate their own haunted house!
All activities on this site require adult supervision. When using this website, you agree to our terms of use. This post may contain affiliate links. I am an Amazon Associate, a Walmart partner, and a member of other affiliate programs and I earn a commission on qualifying purchases at no extra cost to you. Please read our disclosure policy for details.
Halloween Books For Preschoolers
The Pumpkin Thief– Bird’s pumpkins keep disappearing and the animals must use the clues to find out who the pumpkin thief is!
Room on the Broom– How many animals can fit on the broom? After the witch drops some of her things, the animals return it but all want to ride on the broom.
What You’ll Need For This Bubble Witches Brew Experiment
Join the List
Subscribe
How To Set Up This Bubbling Witches Brew Experiment
1. Place the cauldron on a tray or plate to contain any bubbling overflow.
2. Add a few spoonfuls of baking soda to the bottom of the cauldron.
3. Add several drops of food coloring. Purple, green, or orange make great witch’s brew colors.
4. Sprinkle in some glitter for a magical effect.
5. Slowly add drops of vinegar to the cauldron and watch the brew begin to fizz and bubble.
6. Continue adding vinegar to create more bubbling action. Let kids experiment with adding it slowly or all at once and compare what happens.
Benefits Of This Bubbling Witches Brew Experiment
- Introduces chemistry: Children observe a simple chemical reaction between baking soda and vinegar.
- Encourages observation: Kids can watch changes in color, bubbles, and foam.
- Builds fine motor skills: Dropping vinegar into the cauldron helps develop hand control.
- Encourages predictions: Children can guess what will happen before adding the vinegar.
- Builds science vocabulary: Practice words such as reaction, fizz, bubbles, foam, and chemical change.
Halloween Ideas For Preschoolers
Monster Binoculars– Make fun monster binoculars with kids using toilet paper rolls! This easy, colorful craft is perfect for imaginative play and monster hunts.
Paper Plate Jack-O-Lantern Craft– Make an adorable jack-o-lantern trick-or-treat bag using a painted paper plate! This easy, budget-friendly Halloween craft is perfect for kids.
Bubbling Witches Brew Experiment
Make a bubbling witches brew experiment for Halloween! This easy Halloween science activity is a fun, hands-on STEM experiment for kids.
- Prep Time: 5
- Total Time: 5
- Category: DIY, Halloween, STEM
- Method: Step-by-Step
Materials
- Small cauldron or container
- Baking soda
- Food coloring
- Glitter
- Vinegar
- Tray or plate to catch the overflow
Instructions
- Place the cauldron on a tray or plate to contain any bubbling overflow.
- Add a few spoonfuls of baking soda to the bottom of the cauldron.
- Add several drops of food coloring. Purple, green, or orange make great witch’s brew colors.
- Sprinkle in some glitter for a magical effect.
- Slowly add drops of vinegar to the cauldron and watch the brew begin to fizz and bubble.
- Continue adding vinegar to create more bubbling action. Let kids experiment with adding it slowly or all at once and compare what happens.
