Cam-driven artist mechanical toy
This video shows the operation of a cam-driven toy artist.

I found it on Dug North’s Automata/Automaton blog, http://dugnorth.com/blog/
My class notes on cam-follower systems can be downloaded at the link: http://synthetica.eng.uci.edu/~mccarthy/mechanicaldesign101/McCarthyNotes-Cams2.pdf
