This kit comes with molds and enough materials to make twenty PowerBalls! Simply pour the crystals into a mold, hold the mold under water, and when the mold is opened, the ball is ready to bounce. This kit is a terrific introduction to a polymer unit or lesson. Kit makes 20 PowerBalls with 12 molds
Refill Kit (sold separately) contains enough materials to make a dozen more Super PowerBalls in a variety of bright colors! Contains polymer crystals only, no additional molds.