Thames & Kosmos Technology and Electronics Electronics Workshop 2 Electronics workshop II includes all of these parts and more: Resistors, Capacitors, Red, Green, and Yellow light emitting diodes (LEDs) Also includes: infrared emitter, NPN and PNP transistors, Phototransistor, speakers, Potentiometers Also includes: Variable Capacitor, Optical fiber, Sensitive meter, Germanium diode, Silicon diodes, and much more New For Ages 12 and up