This elegant little kinetic sculpture by Aaron Ristau depicts birds in flight. The birds are powered by a small wind-up motor that will run for about a minute.
Much of the mechanics of this piece are made from Meccano -- a model construction system consisting of metal plates, wheels, axles and gears, with nuts and bolts to connect the pieces. Americans will know the modern version of this system as Erector sets
See more artwork by Aaron Ristau on his web site.