This is another great bookshelf idea. It’s not elastic, but balanced… Perhaps the designer (Denis Oh) thought about it as a funny, entertaining decor. The Balance bookshelf is in fact a bit of a balance.
It consists in a shelf fixed in a single point on the wall, two hanging cords and two pins underneath the shelf. To gain its equilibrium one should either find the perfect amount of books put in balance or to adjust it moving the hanging cords. It might look complicated, but it’s quite amusing.