It starts off as a traditional metal baby cot, offering three adjustable mattress heights as your new baby grows. Once your little one is ready for their first big kid bed, simply add the included toddler rail to easily convert the cot to a toddler bed. The convertible ccotbed then has one final evolution as a day bed with the mattress height in the lowest position and the toddler rail removed. Versatile Design Classic Arched Frame Sturdy Construction Adjustable Mattress Heights