A Mini Trolley Problem

Gadget

A tiny train carriage that, when opened, will randomly produce either a snowball or fireworks.
Word has it that a human once posed a dilemma about tying people to opposing tracks and forcing someone to decide which way the train steers... But the Jack Frosts' pranks are nowhere near as cruel as those of humans. "Right" and "wrong" are clearly distinguished, and they even hope that... sometimes accidentally choosing "wrong" isn't such a big deal, as long as you can find a little joy along the way.