Me, introducing the new clock-nightlight gadget to the child:
"See, when the sheep's eyes are open and the light is green, it's play time. When she sheep's eyes are closed and the light is red, it's sleep time."
Child, already prying the sheep's eyes open with her hands:
"So if the sheep's eyes are open I don't have to sleep?..."
Me, making mental note:
"... I am not DMing for this kid. Ever." 