With Snap Circuits- YOU Learn by Doing • 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! 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. Snap Circuits uses building pieces with snaps to assemble different electronic circuits on a simple "rows-and-columns" base grid that functions like the printed circuit board found in most electronic products. Each component is easily identifiable by a different color and functional purpose. For ages 8 and up. Requires 2-AA batteries (not included).