Kinetic Sculpture, Switzerland by Willi Gutmann

Three crescents of bright metal perch on one steel rod, each free to turn its own way.

This kinetic sculpture is by Willi Gutmann (1927-2013), from Switzerland, and is contemporary, in aluminum and steel. Kinetic sculpture generally treats movement as a material in its own right, letting air or a light touch rearrange the composition. A thin steel rod rises from a small square aluminum block. Near the top, three half-moon forms are threaded onto it, their brushed and polished faces catching the light differently as they shift. It is 28.38 inches high, on a base 2.75 inches square.

Restless, but only in the most well-mannered way.