Tooth City! Volcano Eruption


Tooth City! Volcano Eruption

Lately our kids have been obsessed with lava, each day they hop around our furniture saying “the floor is lava”. 😂

So in true dental style, we are ending #scienceweek on a high by creating volcanic toothpaste.

Firstly we created a TOOTH CITY artwork which includes little teeth as people, mouths as housing blocks, a toothbrush drive through, gum tree park, crown shopping centre and a big volcanic toothpaste in its centre. 

The volcanic toothpaste erupted today using our experiment but it did save tooth city as it was at risk of decay!


Our method:

  • A glass jar or cup (capacity 500ml)
  • 1/2 cup hydrogen peroxide liquid (6% solution)
  • 1 tbs dry yeast
  • 3 tbs warm water
  • 1 tbs liquid dishwashing soap
  • A few drops of food colouring
  • Small cup
  • Safety glasses
  • Tooth city artwork (optional) 



  • Pour the hydrogen peroxide into the jar followed by food colouring, and dishwashing liquid.
  • Carefully swish around the jar to mix.
  • In the separate cup add water and yeast mix.
  • Pour yeast mix into the jar with the hydrogen and watch the toothpaste slowly erupt!



  • Take care when handling the hydrogen peroxide – should only be handled by an adult.
  • Use warm water not hot.
  • The foam will overflow so be prepared or place the jar on a tray.

Let’s get erupting! 


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