Alexander Calder Stabile Sculpture
Using only pipe cleaners, a rock (or other base like a chunk of Styrofoam), build a "stabile". Add whatever you have on hand. We had buttons and paper scraps and beads to add to ours. Any kind of wire will work, including the new plastic-coated wires in craft stores (in colors).
This idea is found in "Great American Artists for Kids" by Kohl and Solga.