Try your hand at making your very own Mini Miss home-made rocket.

What to do:

1. Pour all of the hydrogen peroxide into the plastic bottle and stand it in a safe place. This experiment should be done outside as it will get messy!
2. Add a good glug of washing up liquid and a few drops of food colouring (optional).
3. In the separate jug make up the packet of yeast according to the instructions on the packet.
4. Add the yeast solution to the 2 litre bottle containing the hydrogen peroxide, washing up liquid and colouring.
5. Stand back as the contents erupt into a bubbly foamy mess.

Hydrogen peroxide is made up of hydrogen and oxygen and when it breaks down it forms water and oxygen. Usually hydrogen peroxide can break down by itself, but it does this very slowly. What you do when you add the yeast is speed up this reaction. When hydrogen peroxide is broken down fast in this way, lots of oxygen is made really quickly. This oxygen is then trapped in the washing up liquid and makes the big bubbly mess.

The reason why yeast speeds up the reaction is because it contains an enzyme called Catalase - and it's this Catalase that makes the reaction happen quicker. Liver also has Catalase in it, so why not try the experiment again, using chopped up chicken or lamb liver instead of the yeast?