Our 3-in-1 Foldable Mini Crib boast 3 mattress positions for 3 distinct functions! The lowest level is renders the crib a playpen. With one hand, lift the mattress to the middle or upper level for sleeping or changing. The crib folds compact and has convenient rolling casters, making it perfect for grandma's house, a care giver's home, and your home. A super space saver!