Generally, a bed is introduced at about age 2-1/2 or 3, when the child can get in and out of it easily. The American Academy of Pediatrics advises switching to a bed when a child is 35 inches tall. Other signs of readiness include if your child starts climbing out of the crib, or if he sleeps through the night and adheres to a regular bedtime routine. Some popular choices with regard to selecting a bed include:
-A junior bed: This is made for young children. It is low to the ground and has guardrails. However, as it uses a crib-size mattress, it will be good only until your child reaches age 5 or so.
-A twin-size bed: This will work, but push one side against the wall and use a guardrail on the other.

Be sure to keep the bed away from windows, and as your child will be mobile, remember to keep door and entrances to off-limit areas closed and locked, and install a safety gate at the top of stairs.