We did this really neat project a while back. I took two large baking dishes and put about an inch of shaving cream at the bottom. First I let the boys play in the shaving cream a bit...such fun...then we added drops of different colors and mixed with a stick. (Food coloring stains your fingers so you don't want to mix with your hands!) The lay a piece of paper on top of the colored cream, remove, and wipe off shaving cream. Wa-la! You have beautiful paper...for framing or using as stationary. It's really cool! 
