Python Tutor is a great inspiration and benefits from a greater amount of detail, though I've found it not to be very accessible for teaching beginners due to i

Python Tutor is a great inspiration and benefits from a greater amount of detail, though I've found it not to be very accessible for teaching beginners due to its relative complexity. I was fortunate to have the opportunity to see Philip Guo (the creator) speak at Google, though - really inspiring, and clearly very passionate about what he does! For anyone else interested in visualization who hasn't seen it, Bret Victor's Inventing on Principle is also a wonderful idea of how visualization could benefit programmers: http://vimeo.com/36579366 http://vimeo.com/36579366