Snap Circuits Jr. Select Another great addition to the award-winning Snap Circuits product line, fully compatible with all Snap Circuits sets to build bigger, complex, and more creative projects. 133 projects clearly outlined in the color project manual. Projects utilize a glow-in-the-dark flying propeller, phototransistor, LEDs, resistors, ICs, a DC motor and much more. No Soldering - No Tools - It's a Snap! Requires 2 \"AA\" batteries (not included) Elenco's Snap Circuits makes learning electronics easy and fun! Just follow the colorful pictures in our manual and build exciting projects such as FM radios, digital voice, recorders, AM radios, burglar alarms, doorbells, and much more!