The Pogo Ball
Basically, you would find your balance then start hopping while keeping the device under your feet. Hasbro began to market it as the Pogo Ball in the ’80s and that led to the eventual success of it in the ’90s. They were quite similar to Moon Shoes (which didn’t work too well) but if you were a clumsy child then you might have run into some problems. Expect a few sprained ankles and scrapped knees dealing with one of these.