Kinetic art is art from any medium that contains movement perceivable by the viewer or depends on motion for its effect. Canvas paintings that extend the viewer’s perspective of the artwork and incorporate multidimensional movement are the earliest examples of kinetic art.[1] More pertinently speaking, kinetic art is a term that today most often refers to three-dimensional sculptures and figures such as mobiles that move naturally or are machine operated (see e. g. videos on this page of works of George Rickey, Uli Aschenborn and Sarnikoff). The moving parts are generally powered by wind, a motor[2] or the observer. Kinetic art encompasses a wide variety of overlapping techniques and styles.