Great idea RE the twin mattresses. I also love the tree pictures on the wall! Love to display kid-made art in a kids room! Two twin mattresses, some plywood, and a great playroom that doubles as a guest room or sleepover room.
Turn a kid's closet into a reading nookor a cute little hidden bed. Like sleeping in a fort every night. Love this for a guest room, for the kids. you could make the bed a Murphy style, so it could still be a closet when needed.
This is a neat reading nook. I like the idea of curtains in place of doors, especially since this is a kids' room. Keep an eye out on them, but they feel like they still have privacy. This is a great idea for a playroom, too.
3-in-1 Flex Room: Guest Suite, Play Room, Room for Two