Here's a moving head Lego Turing machine: <a href="http://www.youtube.com/watch?v=cYw2ewoO6c4" rel="nofollow">http://www.youtube.com/watch?v=cYw2ewoO6c4</a><p>I'd be more interested in a Lego Turing machine that isn't using a microprocessor to run the motors and sensors. I believe I saw a link to such once, but can't find it now.