1.Strap a large piece of paper to your den wall and throw paint balloon bombs at the blank canvas
2.Pour drops of paint into a full tub of water and watch it turn into a rainbow
3.Have a bath with a rainbow bath bomb
4.Do some rainbow hand painting
5.Paint different parts of a colouring page in different colours
6.Decorate your bedroom in rainbow wall decal stickers
7.Paint colourful spots on plain white clay mugs
8.Blend a multi coloured rainbow smoothie or slushy
9.Paint a picture of a dull place in bright colours
10.Or...paint a blank white wall in a rainbow of colours!