Digital for Arduino
Digital electronics for Arduino Workshop. You can easily sign up for the class here
You will need to have an Arduino or an Arduino clone to participate in this workshop. They can be purchased online (but be aware of shipping times) or at a local Radio shack http://www.radioshack.com/product/index.jsp?productId=12268262 You will need to have a USB cable to connect to your computer.
Other Arduino retailers Adafruit http://www.adafruit.com/products/50 Sparkfun http://www.sparkfun.com/products/9950 Solarbotics (Canada - can have slower shipping) Seeed studios
Again, do not forget the USB cable You can also use a serial based Arduino such as the Diavolina ($13!!!), but you need a $20 cable!
All other supplies are included in the cost of the workshop (wire, leds, switch, solderless breadboard, speaker, etc)
LVL1 has snacks and sodas available, but you can bring your own if you want.