Let your kids try this technique at home because it's entertaining, uses only two ingredients, and leaves no mess!
Ages: 3 - 5
A little messy
Simply squirt paint into Ziploc bags and make sure they are sealed shut (you can add tape if you are nervous about your kids opening them)
Adding two colors is an interesting way to experiment with color mixing. Older kids can practice writing their letters.
Also, experiment with running various things over the paint!