For your child's first bed an upper bunk bed can be ideal. With front and back guardrails there won't be any tumbles onto the floor! When your child is ready or you need the extra bed, you can add on the appropriate lower bunk bed. CD Furniture beds will always be available to add on. Upper and lower bunk beds are available in twin, full and queen sizes. Twin and full beds are available in the same extra-long length as queen beds. Extra leg room is always appreciated. Adding drawers under the bed can eliminate the need for a dresser - more space for a larger bed! View options at Under Bed Storage.