short programming projects for kids

[bobdc]

I will be teaching an "Introduction to Programming" class to some
middle school aged children and will be using Python, obviously. Does
anyone have suggestions for simple little programs to create and
analyze with them after I get past turtle graphics?

Turtle graphics will be plenty for the first session, and I will leave
time to ask them what they'd like to do in later sessions, but I was
curious if anyone on the list has experience picking pedagogical
programming examples appropriate for twelve-year-olds' attention spans.
thanks,

Bob