I really like the pins and clothesline idea for hanging up pictures. It'd be cool to hang photos or pieces of art across the top of a classroom whiteboard, I would put the quote "Live out of your imagination, not your history" up there though
Tree book shelves -- great for kids room. Enticement to read. I'd like to see it made with darker wood or painted a rich brown color and placed in a living room. Also, this is full like a summer tree, I'd keep it more like late autumn with fewer displays.
DIY Creativity Center (Toddler-Friendly & Baby-Proof