Schrödinger's Happy Meal
You do not know if the toy in your Schrödinger's Happy Meal is a boy toy or a girl toy until you have opened it.
Child: mom, i got a girl toy :(
mom: you did not know if the toy was a boy toy or a girl toy, therefore it was a Schrödinger's Happy Meal
mom: you did not know if the toy was a boy toy or a girl toy, therefore it was a Schrödinger's Happy Meal