Wikipedia
Skyball
The Skyball is a helium- and air-filled bouncy ball toy sold by Maui Toys. It has received much attention and critical acclaim due to its high restitution, or bounciness. The Skyball is often compared to the popular 1965 Wham-O Superball. The Skyball is advertised as bouncing higher than a 1.5 inch Superball, which is a brand of bouncy ball.