You will need:
- food colouring (red, blue, yellow)
- shallow bowl or plate
- washing up liquid
- cotton buds
- milk (full fat works the best)
Method:
- Pour some of the milk into your shallow bowl or plate. Let it settle.
- Carefully add three drops of each food colouring into the milk spaced around the bowl in the shape of a triangle.
- Take a cotton bud and dip it in the washing up liquid.
- Carefully place it in the middle of the bowl.
- Watch the colours “dancing” on the surface.
How does it work?
Research: hydrophilic and hydrophobic
properties of the washing up liquid
