Equipment
  • Flour
  • Salt
  • Cooking oil
  • Water
  • Large bowl
  • Plastic bottle
  • Baking tray
  • Red food colouring
  • Washing up liquid
  • Baking soda
  • Vinegar


Activity:
  • Mix together 800g of flour, 250g of salt, 4 tablespoons of cooking oil and 500g of water in a large bowl.
  • Combine the ingredients together using your hands until the mixture is firm. Stand the bottle upright in the middle of the tray. 
  • Mould the dough around the bottle until it resembles a cone but don't cover the bottle top.
  • Fill the bottle nearly to the top with warm water and sprinkle in a few drops of food colouring.
  • Pour 6 drops of detergent into the bottle and add 2 tablespoons of baking soda.
  • Gradually pour vinegar into the bottle. Your volcano will begin to fizz and spurt red lava!

How come?

When baking soda and vinegar are mixed together it forms a chemical reaction.

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