Your home, your power, know how it works! Learn about circuitry, security systems, dimmer switches, automatic lights, alarms, motion detectors, fan speeds, appliance motors, generators, and much more! Build a house or city tower with real, working, 3-D circuits, just like the ones you use every day. With seven colorful base grids to make your structure your own, learn how electricity travels and powers your home. For ages 8 and up. WARNING: CHOKING HAZARD - Small Parts. Not for children under 3yrs.