From Wikipedia, the free encyclopedia:
A space hopper, also known as a skippyball, kangaroo ball, bouncer, hoppity hop, or hop ball, is a rubber ball (similar to an exercise ball) with handles which allow one to sit on it without falling off. The goal is to hop around with it, using the elastic properties of the ball to move forward.
The term "space hopper" is more common in the UK; the toy is less familiar in the United States, and may be known as a "hoppity hop" or some other name. A similar toy popular in the U.S. in the 1980s was the pogo ball, which has a hard plastic ring encircling the ball instead of a handle.
