Recently I made a Tipi tent for my cat. Originally I was thinking to make a real size one for myself as it was always one of my childhood dream, unfortunately I don't think there is any space left in the house, maybe in the future.
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!