A fun tool for demonstrating or teaching python?

[Greg Ewing (using news.cis.dfn.de)]

> "WP" <warrenpstma at _______.com.hotmail> wrote
>>I am thinking of whipping up something, perhaps with the ability to walk
>>through the code ('animated' debugger) and to do something visual or

Something you might like to consider in this area is displaying
a graphical representation of Python data structures. If you
can get people visualising how objects and references work
correctly from the start, it would help clear up a lot of
confusions that beginners often have due to mutating shared
objects.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg