Merry Musical Mechanics They do everything but baby sit - these mechanical dolls, products over the last two centuries, of Swiss watchmaking genius. Children exploring these little machines at an exhibition. Some featured works: a mechanical caterpillar crawling, a very tiny music box with moving parts, fake birds chirping in cages, and an amazing person-shaped doll that sketches (and it draws very well!). Also some shots of gears turning. Amazing inventions - and they are old, many from the 18th century.