Little Girl's room.I've always loved the girl owls! Cute idea for a little girl's room! If you don't wat to paint or adhere stickers to the wall for the name - use smaller wood letters painted a solid color and hang.
Instead of a headboard, place bookshelves to frame the bed. Add lights for late night reading. This would be great for a guest bedroom. Leave the shelves at the end of the bed empty for the guests to unpack their clothes. or kids room
Fort idea for where the rocking chair is now in D's room. Use a tension rod between the furniture and the wall to create a fort. What kid doesn't love a fort? This would also make an awesome reading nook!
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.