Polvo - Crumbling Down
(Exploded Drawing)

Polvo are a group of friendly robots who use maths and loudness to make a wonderful racket.  They were deactivated in 1997 for fear that they were actually Skynet in a sneaky disguise.  Now that we know this is not the case, they have been reactivated and are delighting children worldwide with their clings and clangs.