Convert your Stokke Sleepi Mini into an elegant crib with this ingenious beechwood bed extension. The mattress height is fully adjustable, and the crib comes with lockable wheels so you can move it with you from room to room. Once your little one is ready to transition, remove the side panels and the crib becomes a toddler bed. One kit, two beds-that's the beauty of the Sleepi concept, a masterpiece of minimalist Scandinavian design. Style Name:Stokke Sleepi Convertible Bed Extension. Style Number: 5275665. Available in stores.