Elephant Toothpaste STEM Activity for Preschool

Elephant Toothpaste STEM Activity for Preschool

Y’all science is my jam. I absolutely love it! It’s my favorite part about writing these lessons and doing activities with Rea because I know that she is going to get so excited seeing all the different experiments and watching all the different reactions take place. This experiment is one that I know will not disappoint.

I did not come up with this experiment and I didn’t even name it. There are many bloggers who have tried and shared their Elephant Toothpaste experiment on Pinterest. There is no toothpaste involved in this activity, it simply looks like something that an elephant might use as toothpaste.

This preschool activity is great for getting your Lil’ interested in science as well as working on our observation and conclusion skills.

Lil’ Explorers Focus Skills


  • Pose “what” and “why” questions about their surroundings
  • Make predictions and perform experiments
  • Understand 3 of the 5 senses to make observations

Lil’ Creators Focus Skills


  • Pose “what,” “why” and “how” questions about their surroundings
  • Make predictions, perform experiments, and discuss results
  • Use 5-senses to make observations

Required Materials

*Affiliate Link

Water Bottle

*Hydrogen Peroxide

*Dish Soap



*Food Coloring (Optional)

Step #1
Combine 1 teaspoon of yeast with 2 tablespoons of warm water in a small bowl and mix well so the yeast has time to react.

Step #2
Add 1/2 cup of 6% hydrogen peroxide, a few drops of dish soap, and food coloring to a water bottle using a funnel to pour it in.
Step #3
Mix the water bottle gently to combine the hydrogen peroxide, dish soap, and food coloring.
Step #4
Pour in the yeast through the funnel and quickly remove the funnel.
Step #5
Watch as the ingredients work together and react.

Teacher Tip

To keep this from getting uber messy, place the water bottle in a pan to catch all the foam.

This experiment works best with 6% hydrogen peroxide, but it is expensive and hard to find so we used 3% and my kids were more than happy with the reaction.

Lesson Bundles

Want more lessons like this? Check out my lesson bundles!

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