The Mamas & Papas crib will be a unique crib for the first years of your baby. The base of the mattress has 2 height positions to adjust it according to your needs. The high position is for when the baby is newborn and the low position is for when he has grown up. When your baby grows up it can be converted into a toddler bed to last up to 4 years. A very beautiful choice for the nursery room!