Fidget spinners, those fiddly little toys with a disc at the center, have become an unstoppable craze. Kids can't stop spinning them at home or in class, and even many adults admit to being obsessed.

A fidget spinner. A coconut. An electric razor. The aliens from "Chicken Little." What do these things all have in common? They've all been jokingly presented on Twitter as look-alikes for the new ...