This is pretty awesome - indoor tent / chandelier "secret space" by somethings hiding in here, via Flickr
Attach 2 or 3 doors with hinges to make a screen-like divider. | 27 Ways To Maximize Space With Room Dividers
A company called Blandito has designed a circular, foldable pillow that can be manipulated into many shapes (bed, chair, cubbies of different kinds.) Extra larges for adults as well as children's size. I can see this being great biofeedback for sensory averse/craving children. Too bad it's still in the design phase!