The Hands-On Lightning Rod is the newest tool in experimenting with open and closed circuits. Completely safe to touch and handle, the Hands-On Lightning Rod features electrodes on each end of its 7.5″ long tube. When these electrodes are touched simultaneously, long-lasting LED lights inside the tube flash and the tube makes a noise. Release one of the electrodes and the flashing lights and noise stop. Do it over and over… it works every time!