DIY,TOY,FUNNY TOY DIY JUMP SAND DIY,TOY,FUNNY TOY DIY JUMP SAND1.Put the sump sand into the mold.2.Put the mold into water, keep it for 10 ~30 seconds.3.After you open the mold , the ball is ready.The ball is not sticky ,the sand is not easy tofall and it with good bounce. DIY,TOY,FUNNY TOY