I see a lot of "almost" bookshelves. They hold books and look "design-y" but they waste energy and space. If you are really into books, it's not about the cute shelves. It's about the books. Make that space hold as many as it can.
Did you know that you can build an exploding chain reaction by weaving together popsicle sticks or craft sticks? The chain stays together as long as you hold down the end that you are building … (not sure why this is "for boys")