62 Pieces, great value: 10 base boards, 20 posts, battery post, stairs, 2 spindles, 50 punch-out wall/floor panels and accessories (8 sheets), 8 jumper and extender wires, forward/back switch, 2 yellow LED lights, red flashing LED light, flickering LED light, light sensor, switch, push button, speaker, motor, and 32-page construction activity book 20 Kinetic, energetic circuitry projects: Create a garage door, drawbridge, flickering fireplace, television, automatic night light, silent alarm, elevator, and more while learning the science behind things like conductors, insulators, electric circuits, and diodes