A mobile is an abstract sculpture made chiefly out of sheet metal, steel rods, wire and wood. Some or all of these elements move, propelled by electric motors, wind, water or by hand.
Alexander CalderMy whole theory about art is the disparity that exists between form, masses and movement.
Alexander CalderTo most people who look at a mobile, it's no more than a series of flat objects that move. To a few, though, it may be poetry.
Alexander Calder