We gave last weekend a Arduino workshop for beginners on the Gogbot, an art event in Enschede. The workshop itself is very basic, the participants learn how to wire up 8 leds on a breadboard and how to make them blink and making a loop light.
You can use this material as you like, but we would appreciate a message if you use it ;-)
More about this workshop (in Dutch)http://tkkrlab.nl/wiki/Workshop_Arduino
The english manual that goes with this workshop:http://tkkrlab.nl/w/images/9/92/Arduino_workshop_eng.pdf