Your little one can?t stay little forever. Transform your Stokke? Sleepi into a Junior Bed with the Stokke? Sleepi Junior Extension. With this addition, the Sleepi can be used as a sofa and play area as well as a child?s bed. Get the most out of your child?s furniture with the Sleepi Junior Extension. Suitable for children up to 10 years. Extends bed to 67.6". Made from durable solid beech wood.*Mattress is not included.