Use food colouring and water to fill the small containers
Pour out cotton balls, near the small containers of coloured water. Add the chopsticks.
Place the large sheet of paper or newspaper within flinging distance from the activity.
Ask children to pick up the cotton balls, dunk them in the coloured water and fling them through the air onto the paper. Its a good idea to not give detailed instructions, or show them how to do this activity, but rather sit back and watch them experiment.
Encourage the children to test out their ideas and discuss their findings. Looking at different splatter patterns on the paper is interesting too.
If you want to keep this painting, pick off the soaked cotton balls, and leave to dry on a flat surface.