The Big Boy Bed. We are still dealing with our little guy getting out of his big boy bed. He is 29 months. There are a few ways to deal with this. The first is to use the crib as a go to. If he doesn't stay in his bed say, "do you need to go into your crib instead." Tell him, "the next time you get out of your bed your going in your crib." If you have to put him back in the crib I give my guy about 5-10 minutes screaming and then I go back in there and ask him if he wants to sleep in the big boy bed. Sometimes he says yes and stays in his bed and other times he does not. If he doesn't stay in his bed then put him back in his crib and he sleeps in it.
The second way is to sit in his doorway until he goes to sleep. This is difficult because you will give up your evenings to do this one. This one worked for a friend of mine. They know they are being watched and each time they think their going to get out of bed they realize you are sitting there.
The third way is to continue to put him back in his bed. When you put him back don't say a word and gently put him back. He will realize he is not going to get a reaction out of you and give up. It takes alot but it works for some.
The other thing about this age the stage they are in they want to assert their independence and make their own decisions. It makes them going to sleep for a nap or for the night very difficult.
All of this information came from a sleeping book I have. I've searched high and low because we have tried everything. We have resorted to sitting with him until he goes to sleep right now. We went home to Arizona to see my family and it messed up the sleeping schedule.
If you hear of any other way would you please let me know. I would really appreciate it. I wish you all the luck in the world.