Kinetic Sculpture

On the subject of sculpture which moves (next post down) have you come across Theo Jansen's kinetic sculptures wandering along Netherlands' beaches? Here's his wind-powered Rhinoceros crossing a road under its own steam ... er ... sort of. As art goes it leaves a lot to be desired, but as a feat of engineering it's more exciting than your average windmill. And who knows where it might lead? Michelangelo's David striding along the beach? Oo-er! On a nudist beach, maybe.