If you are introducing soldering kits to your students, you'll want this value packed 4 in 1 package. The student starts by following detailed instructions on “how to solder” and builds a non functional “learn to solder kit” which includes a PC board and all parts. After he or she has gained the skills necessary to solder properly, the student progresses on to each of the 3 exciting kits listed below. Each one operates on its own and can be mounted in an optional box if the student desires. At the conclusion, the student has built 1 non functional kit and 3 fully operating kits that he/she can enjoy. All kits are Skill Level 1 and come complete with all parts, PC board and instructions. Each kit (except the non functional Learn To Solder Kit) operates from a 9V battery (not included). Here are the included kits: LEARN TO SOLDER KIT - Complete kit of parts and PC board to introduce students to soldering techniques. The student solders the electronic components to the PC board to gain ample practice in good soldering. By the time the student has finished building this non functional kit, he or she should know how to solder and how to identify various electronic parts. This kit does not function and is meant for practice and training only. Size of PC board: 2.5” x 1.2”. ELECTRONIC SIREN KIT - This kit produces the upward and downward wail of a “police siren” as you press and release a small pushbutton. Uses a small speaker. Size of PC board: 2” x 1.25”. YES/NO DECISION MAKER KIT - Simply press the button on your decision maker kit and two brightly colored LEDs will begin to flash. As soon as you release the button, one of the LEDs will remain on. The green LED indicates yes and the red LED indicates no. Uses IC circuitry. Size of PC board: 2” x 1.25”. LITTLE JITTERBUG ROBOT KIT - This little jitterbug robot is waiting for night, or when it’s completely dark, to roam the countertops in search of goodies ;) The light sensor allows the jitterbug to come alive and scoot around with the help of a tiny vibrating motor. Customize its antennas and legs. Flashing LED allows you to find this little critter. Operates on a 3V CR2430 coin battery (included).