Cool Exercise Toy Balls for Diving - the ball that bounces on water can flow or sink under water on the basis of how much water you fill in, the design combining components of pool football and water basketball, great bouncing balls for adults which also encourages exercise for kids and teens of all age 9" Balls with Water Injector - diving ball can be filled with water and air to 9 inch approximately, ideal size for water and diving games in the pool, lake, or pond; to fill the water balls and make them neutrally buoyant, you can fill it up with water and just some air to get it at the right buoyancy; float like a board and sting like a bee, allows you to play underwater balls in new and interesting ways Better Remained Patterns & Colors - the swimming pool diving ball is made of ductile PVC materials, which is tougher and thicker than normal air filled balls, better played underwater and anti-cracking to endure rough playing; colors and patterns are printed by more rigorous work, which ensures a better quality and colors won't fade easily like others when soaking in the water, safe materials for the family and excellent for pool parties and get-togethers Pool Gifts that Your Kids Gonna Like - the diving ball game can be a great swimming gift, a must have summer swim accessories that encourage under water sports; also can be a great birthday or graduation gifts, make this summer more fun and create priceless memories for the family and friends