She's almost 20 months now, and a few weeks ago I caught her in the corner of the crib grabbing one side with her hands, and had one leg over the other side. She was trying to get the other leg over but was falling just short. We figured it was time, but the bed we got was elevated off the ground and has a ladder to get into it and a slide to get down. There is also a play are below the bed. We may just put the bed down there and let her sleep there until she is used to it.
Paladin0