T.P.
my 31 month old still sleeps in his crib. I keep the side rail in the down position and he climbs in and out as he pleases. I converted it to a bed once he started climbing out but he kept falling out of bed!! So I put the rail back on. He enjoys climbing so he's pretty happy.
By the way he started off climbing in but wouldn't climb out until he was over 2 years old. I wouldn't stress over it. He'll do it when he's ready. My pediatrician said her son stayed in his crib til he was 3!!