K.B.
I moved my son into a toddler bed at 14 months old. He just flat out stopped sleeping in the baby bed. He was crying all night long, and was actually sleeping better on the floor and empty bed in the house during nap time. So I too down the baby bed and got a "big boy" bed and he started sleeping through the night instantly. He has never been one to get into things that he's not allowed to though. I had an aunt who needed the baby bed, didn't want to buy a "big girl bed" so she put the twin size mattress right on the floor. My little cousin LOVED it and took to it immediately. Different families move children at different times as needed, or what fits them. I know a family that kept their child in the baby bed until they realized she was climbing out of the bed, to go to the bathroom and then climbing back into the bed (using a near by dresser). Good luck!