First of all, I advise keeping your baby in a crib as Long as Possible. It is nice to have them contained and you don't have to worry about them waking and wandering the house. My 2.5 yr-old has been able to climb out of his crib for a while now. I think his older sister showed him some tips to climb out. She's very helpful like that. At first I just told him very firmly not to climb out of his bed when I put him down. He's pretty obedient when he knows I'm serious. It worked pretty well for a month or two although he got out a few times when his sister got to him first. He didn't seem to hurt himself (luckily he's pretty cautious about getting hurt). But it was definitely time to make the transition.
|my little guy posing in his big boy bed|