You will need:
- Thick paper
- Red, blue and yellow food colouring
- Cotton balls
- Plastic drinking straws
- Plastic clothes peg
Put a few drops of food colouring into separate dishes. Don’t water it down. Cut the drinking straws to a shorter length. These are going to be your paint droppers. Grip a cotton ball firmly with the peg.
Using the straws, put a drop of each colour onto the cotton ball.
Dampen your paper with a clean cotton ball and water.
Use your peg and coloured cotton ball to draw with. See how the colours mix and become a rainbow? How many colours are there?
Let the rainbows dry, cut them out and make a picture!