M.K.
I've been advised that children should be kept in the crib as long as possible -- and that they will show you when they are ready. My daughter is 32 months old. Even though she can climb in and out, she seems to love her crib and NEVER climbs out when she wakes up from naps or in the morning. At this point, I guess I'm going to keep her in the crib (if she is happy and doesn't climb out on her own) until she is potty trained and wakes up to do potty in the middle of the night.