The transition from crib to toddler bed is a momentous occasion. Your child isn’t a baby anymore. He has entered into toddlerhood and is ready to be a big kid. There’s no set time for making the move to a toddler bed, but most children do make the transition sometime between 18 months and three and a half years old. It’s often best to wait until your child is closer to three, since many younger kids just aren’t ready for a bed – just yet.