Oh, just thought of something creative for the not-so creative. My son (2-1/2 ish) loves to take pictures. He has a little, cheap, old, broken camera that works only well enough that he can advance the "film" and release the shutter. It clicks and makes noise and he can run around composing pictures all day long. No mess, no fuss, no cost, happy boy. It's a good balance to the projects that take half the day to set up and the other half the day to clean up.