Possible option for "framing" the window seat in the play area with functional storage, would also add pillows to bench area since window is not as low, and add crown molding to make it appear more built-in
10 ways to keep a kids closet organized. Clever labeled containers and a small dresser turn this compact closet into storage central. Design by Rate My Space user annehayes. Maybe as linen closet space?
Built-in bed. Great idea for houses with a half-story with sloping ceilings. This bed concept can fill that hard-to-use space against the wall. Change the shape of the openings in the bed sidewalls and it would be perfect for boys too.