Baby Cot-BedThere is no set time that you should get rid of your child's cot and put him in a bed, although most children make the move sometime between ages 18 months and three and a half.
Many parents switch their child to a bed when they feel he has outgrown the cot, but the arrival of another baby is one of the most common reasons to make the move. If you're having another baby, make the switch at least six to eight weeks before you're due. You want your older child well ensconced in his new bed before he sees the baby taking over his cot. You could also delay the switch until the new baby is three or four months old. The newborn may spend those months sleeping in a Moses basket anyway, and your older child will have time to adjust to the new baby, making the transition easier.