Have a shelf for child's favorite creation that can be on display for the week. Also take a picture of it and keep a special album/scrap book for llowen of their creations with the story behind their creation.
My older two boys share a room and sleep in bunk beds. Since we moved them to bunk beds it's been great as it has opened up a ton of space in their room for quiet time away from the chaos of the rest of the house. I love bunk beds.