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Elephant Toothpaste

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Active Time
< 10 minutes
Total Project Time
< 10 minutes
Key Concepts
Chemical reactions

Introduction

Create a giant foaming reaction and wow your friends with this classic science demonstration! With just a few simple ingredients, you can make something that looks like toothpaste being squeezed from a tube—but so big, it must be for elephants!

Credits

Ben Finio, PhD, Science Buddies
Svenja Lohner, PhD, Science Buddies
This activity is not appropriate for use as a science fair project. Good science fair projects have a stronger focus on controlling variables, taking accurate measurements, and analyzing data. To find a science fair project that is just right for you, browse our library of over 1,200 Science Fair Project Ideas or use the Topic Selection Wizard to get a personalized project recommendation.

Materials

  • Empty plastic bottle
  • Dry yeast
  • Warm water
  • Liquid dish soap
  • Liquid food coloring
  • 3% hydrogen peroxide. See the Further Exploration section for instructions on using a higher concentration of hydrogen peroxide.
  • Measuring cups and spoons
  • Safety glasses
  • Large tub or tray to catch the foam, or outdoor location to do the experiment

Disclaimer: Science Buddies participates in affiliate programs with Home Science Tools, Amazon.com, Carolina Biological, and Jameco Electronics. Proceeds from the affiliate programs help support Science Buddies, a 501(c)(3) public charity, and keep our resources free for everyone. Our top priority is student learning. If you have any comments (positive or negative) related to purchases you've made for science projects from recommendations on our site, please let us know. Write to us at scibuddy@sciencebuddies.org.

Reviews

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Active Time
< 10 minutes
Total Project Time
< 10 minutes
Key Concepts
Chemical reactions
icon scientific method

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