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).