How to make a paper mache volcano erupt

Written by sarah jorgensen
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How to make a paper mache volcano erupt
A chemical reaction between baking soda and vinegar creates the fizzy explosion. (eruption image by YvesBonnet from

Crafting a paper-mache volcano is a great activity for a science enthusiast of any age. Creating a dramatic eruption is simple to do with common household materials.

Skill level:

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Things you need

  • Complete paper-mache volcano
  • 2 tbsp baking soda
  • 1/2 cup vinegar
  • 1/4 cup warm water (optional)
  • Red food dye (optional)

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  1. 1

    Pour two tablespoons of baking soda into the container at the centre of the homemade volcano.

  2. 2

    Add 1/4 cup of water dyed with red food colouring to the container if you wish to create a more-realistic demonstration.

  3. 3

    Pour 1/2 cup of vinegar into the container with the baking soda (and water if added) and observe the dramatic fizzing eruption.

Tips and warnings

  • This eruption may cause a mess, so be sure to perform this demonstration outside or in an area covered with newspaper or another protective material.

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