Every morning, before he leaves the house, my son goes and hides in a box to become a "DS-in-a-box".
I have to turn an imaginary crank against the side of the box whilst singing a tinny version of "half a pound of tuppeny rice" getting faster and faster until he pops out, when I have to look shocked. He then gets his shoes on and we head out the door.
Does anyone else have any strange things their children insist on doing or insist that you do?