It took two three hour sessions, but I got five or six people on the ground and running with Arduino. Another fellow already knew what he was doing and was just there for giggles and one more fell prey to a missing package dependancy and an overburdened 'net link.
We started with a very basic blinky light, moved into switches, a CdS photosensor, servos and finally we rocked some LCD screens
Next time I'll have some 2-D animation to better demonstrate the voltage/water pressure analogy and also have paper overlays for the breadboards just to get folks that final assurance of a proper connection.
John December took some great photos of the session:

One student coding for his LCD screen.



