One of my favorite things to do in the classroom or with my own kids was to make Play Dough or Finger Paints. This was always a great thing to do in the summer. Here are a few recipes that you might enjoy!
How to make Homemade Play Dough
Edible finger paint for Toddlers
5 Finger Paint recipes
Finger Paint with puddinghttp://www.toddlebits.com/2008/04/fun-with-food.html