There's no set time when you have to replace your child's crib with a regular or toddler bed, although most children make the switch sometime between ages 1 1/2 and 3 1/2.
It's often best to wait until your child is closer to 3, since many little ones just aren't ready to make the transition. Of course, you'll need to move your toddler to a bed when he's simply too big or too active to sleep in a crib anymore.
Many parents make the switch because they're worried that their active toddler might climb or jump out of his crib — and this is a real safety concern. But it's best not to react to climbing out of the crib or any other sudden sleep problem with a sense of alarm.
Don't rush right out and buy a new bed the day your toddler first climbs out of the crib. He may not be ready to move to a bed, and it may not be safe for him to be up and about during the night when everyone else is asleep. Buy yourself some time by lowering the crib mattress as far as possible, so the side rails are relatively higher and more difficult to climb over.
Another reason parents make the switch to a bed is the impending arrival of another baby. If this is your situation, make the switch at least six to eight weeks before you're due. You want your toddler well settled in his new bed before he sees the baby taking over "his" crib. Depending on your toddler's age, you could also consider delaying the switch until the new baby is 3 or 4 months old. Your newborn will probably spend those months sleeping in a bassinet anyway, and your toddler will have time to adjust to the new baby, making the transition to a bed easier when it does happen.
Be sure to base the timing of the switch on your child's readiness rather than on the need to free up the crib, however. Many parents find out too late that it would have been easier to borrow or buy another crib rather than move their older child to a bed before he was ready.
Some children adjust readily to this change, while others have a hard time with it. Every child is different. It's not unusual, though, for firstborn children to resist the transition. He may be very attached to his crib and all of his associations with it. The move to sleeping in a bed is just one of many changes at this stage in a toddler's life — it may coincide with toilet-training, starting preschool and other pressures to "grow up."
If you find that you've made the switch too soon and your toddler is upset, don't give up right away. Encourage your child to try out the bed. If he's still distraught after a few days, bring the crib back.
Some toddlers simply aren't ready for a bed. If your great sleeper all of a sudden takes a long time to fall asleep at night, gets out of bed many times, or wanders around the house, he's probably not ready for his own bed. As with potty-training, sometimes it's worth taking a step back and bringing back the diapers — or in this case, the crib — and trying again later. Just be sure you don't present the reappearance of the crib as a step backward in development or a punishment.
SOURCES:Deborah Lin-Dyken, pediatric sleep disorders expert. (No Date). When will my baby respond to her name? Baby Center [Online]. Available: http://www.babycenter.com/404_how-and-when-should-i-move-my-child-from-a-crib-to-a-bed_4598.bc