Outer space, a new frontier, was sufficiently vast and mysterious to allow designers and toy manufacturers near-complete freedom of imagination and creation. One rather enigmatic but popular product was Mettoy’s Space Hopper. These bright orange vinyl bouncing balls, two feet in diameter, with kangaroolike faces and handles that resembled horns, are said to have been inspired by children bouncing on fishing buoys in Norway. — Century of the Child / Radiolab
Who wants to race on a space hopper?