Sleep habits

I know I have been very lucky with Troy. Usually at 7-8pm he asks me to go to bed, I lay down with him for like 15 minutes and he is sound asleep until I go to bed. He has never even attempted to get out of bed, and he has always slept in my bed, so he can easily get out if he wants to. Well there is a first time for everything, tonight he actually came running in to the living room about an hour after he went to bed. Luckily all he wanted was for me to tuck him in again. Let's hope he will not get any ideas from this.