You are going to be amazed by this drawing robot who can sketch your portrait just by looking at you.
This Aikon2 Skediomata robotic arm was presented at the Kinetica Art Fair in London a few days ago.
It uses a video camera to view facial features and then the "hand" reproduces them on a piece of paper using a pencil.
The software was developed by a research team at Goldsmiths University of London and it would not be expensive to produce.
More info on the Aikon-Gold project website.
http://www.youtube.com/watch?v=AOtQAhblRps
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/blog/show/robot-who-draws-your-portrait