I knew it was a matter of time that Sarah did this. Today when Sarah was trying to nap, I kept hearing pacifiers being hurled out of her crib (she has six in there with her). Then I heard crying so I went in to give her the pacifiers back and she was standing in her crib with the main light on. She has always been able to reach that light-switch from her crib but I don't think she knew it until today. So I moved her crib to the middle of the room for a temporary solution. I really hope she doesn't become obsessed with the light-switch because there really isn't another way to arrange her room (although we have considered moving her to the office/playroom).