Kinetic sculptures are sculptures that move, ideally with a minumum of applied force. Mobiles are a type of kinetic sculpture. Many others are wind-powered. Kinetic sculptures are often implemeted as installation art. By definition sound sculpture is kinetic sculpture.
... a good example is the artist Bernward Frank at http://www.kineticus.com/ http://www.kineticus.com/picture/berfra0.jpg
