I never expected we'd have to buy two cribs, but DD& DS are closer together in age than I had anticipated we'd have if we had two. DS seems completely happy in his crib and our ped discouraged us from trying to move him before DD arrives. It's one that you can buy a side rail adapter for to make into a toddler bed, but the length doesn't change, i.e. it's not convertible to a twin bed. We haven't bought the adapter yet, and I'm wondering how long kids typically stay in their cribs and then how long they use a toddler bed? Anecdotes? I know similar age children who are in a toddler bed b/c they were trying successfully enough to crawl out of the crib, I haven't seen DS try to do that since I removed the hard sided turtle nightlight he had in there months ago. Though he tries to climb on everything else in our house and last night he tried to crawl into it!