It's a ball, it's a balloon, it's Hover Sphere with a spiral theme! The gravity defying Hoversphere is like a big, bouncy blimp. Spin it in mid-air, play slo-mo volleyball, invent wacky tricks and games. It's soft, safe and so easy to play! It inflates to a huge 2 feet in diameter. Just fill with air or helium and you're ready to go!! It's refillable so you can enjoy it over and over again.