Mini CNC is 3d printable small drawing machine. Project is under development.
http://plotterbot.com/2013/11/how-to-build-a-tiny-cnc-drawing-robot/
http://www.thingiverse.com/thing:187339
http://plotterbot.com/2013/11/how-to-build-a-tiny-cnc-drawing-robot/
http://www.thingiverse.com/thing:187339