By way of a summation of the array of ideas at his disposal, Adam and Joe's BBC3 profile of artist Nobumichi Tosa and his Meiwa Denki organisation is well worth a look here. Tosa just performed at the Design Indaba and, via a series of videos, went through many of his Nonsense Machines that have delighted audiences all over the world. While his singing robots (who have working vocal cords made of rubber) were actually quite moving, one of my favourite pieces would have to be his "machine for moving a dead fish". Yep, that's really all it does. But then, it does do it very well indeed.