B.K.
My son had a convertible crib. We moved him into the toddler version when he was between 2 yr and 2 1/2. He never tried to get out of his bed, but he was definitely getting too big for me to keep lifting him in and out of the crib. He adjusted well to the toddler bed. Then we converted the toddler bed into a regular bed when he was around 3 yrs and he's been doing fine; Sleeps like a log 8-) Good luck.