gingerbread men (Score 2)

If you've already manufactured all the parts and laid them out in a perfect pattern on the two surfaces, why not do all the assembly at that stage?

As I understand it, you can mass-produce the components using micro- (and perhaps nano-)lithography like a cookie cutter, but what you end up with looks like a bunch of cookies on a cookie sheet. You need the robot arms to put the, er, cookies together.