Look at the photo a heart sculpture above, which is consists of closely interconnected gears. Although it seems that gears cannot move it is not. All of them can rotate around their respective centers, which your can see on a video below. Moving of gears are shown approximately on 50th second of the video but it's
This kind of sculptures are called kinetic because all parts of them can move. It was created by Japanese engineer Haruki Nakamura and represented in 2005 with title Gear's Heart. Unfortunately, there's no any more information about him in the Internet except several images of his sculptures and few videos.
Also he created similar sculpture of cube, which you can see below.