House shape very attractive to children-Serves as a private space for kids when it is covered with a tent (not included)-Dual bed design suitable for friends to sleep over-Recommended 6" mattress thickness for upper bed and < 6" for trundle-PV casters enables you to pull trundle out smoothly-Plywood slats to reduce the squeaking sound cased by turning over-Solid wood structure for excellent firmness and load capacity-No need for an extra box spring-Assembly is a piece of cake and very quick