Materials: Mattress, Plywood, Two Ikea TROFAST toy organizers
Description: Position Trofast organizers into "L" shape. Place large plywood sheet across top. Brace plywood sheet to wall by attaching 2x4 cleats underneath-- making sure to locate studs in the anchoring wall. Using three lengths of 1x6s, box in the mattress at top, bottom and side. I used L-brackets for extra stability in addition to lots of screws!