This one is new to us. We stumbled upon this easy recipe for do it yourself puffy paint. Three simple ingredients are all you'll need...

One tablespoon of salt, one tablespoon of flour, and some food coloring. You can add a bit of water but make sure to keep the mixture thick. After painting, pop into the microwave for 10-30 seconds (until it bubbles and dries).

(via Emmer's Ideas)