Self replicating 3D printer, Replicating Rapid Prototyper: http://reprap.org/bin/view/Main/WebHome (I bet the ID people would be very interested in this too)

LEDs http://www.kpsec.freeuk.com/components/led.htm

Sources for Electronics:  http://www.arduino.cc/playground/Main/Resources

GetLoFi Circuit Bending

EraSer Circuit bent artist