We took the side off of Evan's crib on Saturday morning in order to get him used to sleeping in a toddler bed before the baby comes. After I put him in bed for his nap that afternoon he got out and quietly read books for an hour. The only reason I knew he was up was that he turned off his monitor at one point! When I checked on him an hour after putting him down, I found him laying in the middle of the pile of books. He slept the whole night in his bed Saturday night and then did great napping again today!