What you will need:
A metal jack (from a game of jacks)
Lots of colored rubber bands
How to do it:
Loop, wrap, and twist the rubber bands around the jack until it is completely covered. Remember: The bigger the ball, the higher the bounce.
Reprinted with permission from The Mudpies Activity Book: Recipes for Invention © 1994 by Nancy Blakey, Tricycle Press, P.O. Box 7123, Berkeley, Ca 94707.