This is the Puffy Paint invitation I set up for Caitlyn. If you don't know what Puffy Paint is, I first saw it here. It is a paint made with flour and other food ingredients. (I have a post with the recipe and instructions here.) And when you are done painting with it, you pop your painting into the microwave for about 30 seconds, or until dry. The paint stays fluffy! It's a really fun rainy day activity.
I set out some pieces of poster board (you can also use cardboard, but make sure you use something stiff. You'll need to carry it to the microwave before it is dry), some brushes, some foam stamps, and a few cotton balls.