Kids often enjoy jumping rope. It's a game they can do from they are very young, and many are actually very good at it.
The trouble is, of course, that where kids see fun, parents see danger. And jumping rope is of course a very dangerous thing to do. Kids can fall. That's where this invention comes in. The dangerous thing in jumping rope is of course the rope. By removing the rope from the game, it becomes safe.
But oh, where did this guy pt the fun?