The ScribbleBot is a drawing tool designed by Jon Cumberpatch that can be fed with a preconceived drawing paths downloaded off the internet, to maneuver your hand and pen in way that results in some awesome sketching. The video (in continuation) gives you an example of how things are done.

ScribbleBots from Jon Cumberpatch on Vimeo.

(via Jon Cumberpatch)
(via yankodesign)