The Endover Cube is another famous sculpture in Ann Arbor. It is pretty neat in that it pivots so often you will see people spinning it around.
The cube was created by Bernard Rosenthal who was a student at the University of Michigan and was installed in 1968. It is based on a similar sculpture in New York called the Alamo.
It was actually relatively stationary.
Trying to get a picture of one of the faces.