Experience Adventure and Fun-The Camp -Twin over twin low bunk bed makes a great space saver in an active kids room. The kids bunk bed with ladder is constructed with a sturdy frame made of wood to provide stability and support. The built-in staircase provides a safe and convenient way to access the upper bunk. There is no bed slats in the lower bed, it is an open-row design, so the underbed space can serve as a storage or a fun play area, or you can put a mattress on the floor to make it a twin