How to Make a Clay Volcano

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This is a great activity for summer camps, science fairs or just a boring Sunday at home.

Things You'll Need

  • Brown clay
  • Water bottle
  • 1/4 cup baking soda
  • 1/4 cup vinegar
  • Red food coloring
  • Cardboard square (10 by 10 inches)
  • Set the water bottle on the cardboard square and pour 1/4 cup baking soda into the bottle. Add 10 drops of red food coloring to the baking soda.

  • Use the clay to create a volcano-shaped mound around the water bottle. Keep the structure on the cardboard square, and be sure to leave a hole at the top around the mouth of the water bottle.

  • Add small tree structures or rivers and lakes if you want to make it look authentic.

  • Add 1/4 cup vinegar to the mouth of the volcano. The baking soda and vinegar will have a chemical reaction, and the volcano will "erupt." Don’t worry, it’s not an explosion, just a stream of baking soda lava that will flow out of the top of the volcano.

Tips & Warnings

  • Be sure to set this activity on plastic or do it outdoors since the cleanup process can be messy.

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