You will need:

• 1 plate
• milk
• food colouring (2 to 4 colours)
• washing-up liquid
• 1 cotton bud

What to do:

1. Pour the milk on the plate.
2. Choose 2 to 4 colours of food colouring that you want to use.
3. Add 8 to 10 drops of each food colour to the milk in different spots. (See image above.) Do NOT stir or mix.
4. Put one drop of washing-up liquid on the end of your cotton bud.
5. Hold the end of the cotton bud into the middle of the milk with the food colouring.
6. Observe what happens.
7. You can move the cotton bud around the plate to different places and observe what happens.