Conrad Wolfram: Teaching kids real math with computers
http://www.youtube.com/watch?v=60OVlfAUPJg
How to Turn a Sphere Inside Out
http://www.youtube.com/watch?v=R_w4HYXuo9M
5D Cube
http://www.youtube.com/watch?v=lFvUaFuv5Uw
How To Solve A Rubik's Cube - No Memorizationhttp://www.youtube.com/watch?v=dMuGAmdr8m4
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Turinghttp://www.youtube.com/watch?v=SYB8KXwQ69E&NR=1