Pallet Bed for the girls. I like this, especially for a temporary spare bedroom in my craft room" solution. I think I would actually hang the painted pallets vertically in my craft room when no guests are here and use the pallets like a giant Idea board.
Alternative to couches-two twin beds that can swivel. Would love this in a game room. Great for sleepovers young and old DIY tutorial includes super easy design for headboard/back of couch! + 27 Ways To Rethink Your Bed
Family room ~ I'm pretty sure I could make something like this.a few old pallets sanded back, a slab of mattress foam and pretty material to sew it up with. invest in some pretty cushions and you have a cheap as chips lounge!