This might be a good place to mention my project again: http://pythonturtle.org http://pythonturtle.org It's not nearly as comprehensive as Invent with Python

This might be a good place to mention my project again: http://pythonturtle.org http://pythonturtle.org It's not nearly as comprehensive as Invent with Python, but it also attempts to deal with the challenge of giving a low 'barrier to entry' to learning Python.