foam machine

Create a mess with a foam machine made from vinegar, baking soda, and laundry detergent.

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Foam Machine

This foam machine is so much fun, your kids may forget they're learning about chemistry. Make sure your children wear goggles while doing this activity. And be sure they do this activity over a covered area or the sink.

What You'll Need:
  • Goggles
  • 2 test tubes (or similar shaped glasses)
  • Powdered laundry detergent
  • Teaspoon
  • Vinegar
  • 2 science stirrers (or coffee stirrers)
  • Baking soda
  • Water
How to Create a Foam Machine:

Step 1: Make sure your kids put on the goggles. Have them place 1/2 teaspoon powdered laundry detergent into test tube A. They should fill it 1/3 full with vinegar, and then stir gently with a stirrer.

Step 2: Have your children place 1/2 teaspoon baking soda into test tube B. They should fill it 1/3 full with water, and then stir gently with second stirrer.

Step 3: Ask your kids to pour the contents of test tube B into test tube A. Then have them check it out! Watch the foam as it oozes and oozes all over the place. The acidic vinegar and the alkaline baking soda (sodium bicarbonate) produce a chemical reaction. Carbon dioxide is produced by the reaction. It combines with the soap to produce foam that oozes out of the test tube.

Keep reading science projects for kids: chemical reactions to learn how your kids can magically change the color of cooked cabbage.

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