Camp Loft Bed with Stair, Junior Height (I'd want to add a slide on the opposite end from the stairs, a platform on the bottom with a rolling trundle under the platform. so there's room to play AND still an extra bed.)
I want to make this! DIY Furniture Plan from Ana-White.com A corner base unit to take advantage of tons of space between two twin beds! Place a tv on top or just use for books ans storage. Featuring a face suitable for a cork board or chalkboard.