The Little Free Libraries. The little boxes are designed to hold about 20 books to borrow and enjoy. Each Little Free Library runs on the honor system, displaying a sign that asks patrons to "Take a Book, Leave a Book.
DIY Cardboard furniture That doesn't look like it's made from cardboard! We've had some great posts on cardboard furniture you can buy that doesn't LOOK like cardboard, but most DIY options resemble the brown recyclable stuff.