Most children make the move from crib to toddler bed sometime between age 1 1/2 and 3 1/2, according to BabyCenter.com's pediatric sleep disorders expert. Since the right time to transition to a toddler crib depends on each child's individual development, it helps to be able to recognize the signs that a toddler is ready for a toddler bed. It's also important to be able to recognize the signs that a child isn't quite ready yet: If your toddler suddenly starts having trouble sleeping or taking nighttime explorations, he might need a little more time before he's ready for a toddler bed.
Mobility
Once a toddler is able to climb in and out of his crib, it's usually a sign that he's ready to move to a toddler bed. Climbing out of bed is a safety risk for many toddlers, but BabyCenter.com's pediatric sleep disorders expert encourages parents to think twice if your child's ability to get out of bed on his own is the only reason you are thinking of putting him in a toddler bed. Consider lowering the mattress as far as you can to make the rails higher and harder to climb or install a mesh crib tent to keep your child securely in his crib a little longer.
Bathroom Use
Once your child is completely potty trained, she'll need a bed she can get in and out for nighttime trips to the bathroom. Keep in mind that most children need longer to potty train overnight than during the day, so you don't need to make the switch to a toddler bed as soon as your child starts potty training. Be sure to familiarize your child with her route to the bathroom from her new bed, and consider using a night light to make nighttime bathroom trips easier.
Size
If your toddler has gotten too big to sleep comfortably his crib, he's probably ready for a bigger sleeping space. Note that many toddler beds are the same size as cribs--the same mattress can often be used for both--so if size is a factor in moving your toddler to a bigger bed, make sure you choose one that's large enough.
