Unless you design toys.
The Ridiculous Toy:
In 1965, a toy designer at Transogram Games looked at the success of Hula Hoops, with their elegantly simple design and relative safety, and thought, "Hey, yeah, that. But for your head!"
"Or your tits! We aren't judging."
The Swing Wing was a blue plastic beanie with red, white and blue plastic streamers coming out of the top, and a chinstrap. The idea was that the wearer moved his head and neck in rapid circles to make the streamers fly around, and ... well, that was pretty much it.
All the fun of propeller hats with 10 times the effort!
Even a TV commercial with a catchy jingle and a clapping chimpanzee couldn't make the Swing Wing look like fun. Check out the :14 mark, where a boy attempts to walk while Swing Winging, making him look like he's suffering from some kind of neurological disorder: