Years ago, I went to a science museum (in Baltimore, I believe) that pulled together an exhibit showcasing many of these mechanical movements. Each movement was built and motorized, or implemented by a hand crank so you got a sense of how they worked.

This web site does the same thing. It’s fascinating.

Hard to call out one in particular, but definitely start out with the thumbnails (color means a design is animated), and be sure to check out this one.