As a kid I used to think hoovers were called hoovers because when you turn them on they go "hoooOOOOO-" and when you turn them they go "VVVEEEeerrr".
Point is, kids can often come up with inventive names, and their fresh-look at life means they often end up coming up with funnier and cooler names than the adults who came before them. Why call a crow a crow when you call it a halloween eagle? Why call a rhino a rhino when you can call it a battle unicorn?
I know which names I prefer!