The 0g Zero Bounce Trainer is NOT a toy. It is the worlds first In-home training device that improves a players dribbling skills, develops key muscle groups, and does it all without making a single sound or damage to home. Save the noise for the hardwood and enjoy your child’s development in peace. You will be amazed at the results. The trainer has three holes for adjusting the ‘springback’ of the ball. When you use the center hole both balls have equal return speed, when you offset the connecting tube with an outer hole the ball on the side with no holes will be the single ball to use as the other ball has now become a counter weight. Take another look at the PRODUCT IMAGES and use them as a guide for different hand and body positions. There really are no rules. You can use standing, sitting, alone, with a friend in a battle. Make up your moves and share them back with us. The key to success with any 0g product is relative repetitive motion of key muscle groups in desired skill. The more you use it ‘the less you will lose’ it as far as skill and strength. Hand built in Maine by the same guys who build the 0gsoccer trainer. Contact us at our website for any questions or comments.