Does wood conduct electricity? How about a penny? Make your own " Conduction Tester" and explore what substances are conductors and which are insulators. Hint: most substances can be classified as one or the other. Included in the kit is (2) D cell battery holders, 1 light bulb, 1 light bulb holder, 4 alligator connector cords, a sample pack, and exploration guide. Ages 7+. Battery not Included.