Sculpture in which movement (as of a motor-driven part or a changing electronic image) is a basic element.
Actual movement became an important aspect of sculpture in the 20th century. Pioneers such as Marcel Duchamp , László Moholy-Nagy , and Alexander Calder produced movement by such means as water, mechanical devices, and air currents (as in Calder's mobile s). Neo-Dadaist works such as {{link=Tinguely, Jean">Jean Tinguely 's self-destructing Homage to New York (1960) embody the concept of a sculpture that functions as both an object and an event
a "happening."