The Lean and Clean Balancing Machine Bookshelf is not only a cool looking bookshelf but also serves many purposes. The most functional being that it is not fixed in one position. This bookshelf is always balancing on one round peg in the wall. It keeps the dust off since, it won’t rest on flat surface for a long time. Everytime you take a book off of one side, the whole shelf will tilt. Another useful feature is that the counterbalances are decorative frames. You can put tiny flowers like the ones in the picture or real pictures of you looking scared while going down a roller coaster last year at Six Flags.