- Open the jar and pour the sunflower oil into the jar to about halfway
- Add some drops of food colouring into the oil
- Top it up with water
- Switch on your torch and put it behind the jar
- Put in a spoonful of bicarbonate of soda and put the lid back on
- Watch your lava lamp fizz!
- You can also try this with different colours and in different types of containers
- Make sure to put the lid on so that the liquid doesn't spill out