Jason Allemann has a website devoted to building kinetic sculptures out of Legos. As a child he recalls being fascinated by Legos and enjoying building things. So he combined these two interest and created the JKBrickworks website which is full of interesting projects. One of his most fascinating projects is the sculpture of Sisyphus who received the punishment of pushing a boulder up a hill for infinity. He provided a set of materials and instructions needed to build this amazing sculpture. Although for most of us it might take us an infinite amount of time to build it we can still enjoy this everlasting sculpture.
-Link for video and instructions