Looking to do more experiments? Find what you need in this component kit. These basic science components are a great way to expand our Telegraph Kit, Simple Circuit, Conduction Experiment and Color Theory (sold separately). Kit Includes: single throw knife switch, double throw knife switch, 2 light bulb holders, 2 AA Cell Battery Holder, 10 Light Bulbs, 10 Alligator Connector Cords, and exploration guide. Ages 7+. Batteries not included.