You will need: bubbles, food coloring or tempera paint, paper and a kid that likes to blow bubbles. Also old clothing would be nice.
WARNING: Messy activity but a lot of fun.
Or mix 2 tablespoon of tempera paint with 1/2 cup of bubbles.
We found that the food coloring mixture worked the best.
We set up the paper on easels, but Family Fun suggested to taping a large piece of paper to a fence or between 2 trees.