Build your own solar-powered creations and discover how solar cells generate electricity. Assemble 22 models including a scooter, locomotive, forklift, road roller, cement mixer, solar-wind sail car, crane, amphibious boat, motorcycle, beach buggy, race car, side-car motorcycle, trailer, elevator, oil tanker, maintenance car, solar car with clutch, street sweeper, backhoe, helicopter, twin-prop airplane, and cable car. The two special solar panels in this kit each consist of three solar cells. When linked together in series, they generate up to 3.0 volts of electricity in bright sunlight, like two AA batteries. Two unique cradles hold either the solar panels or batteries, allowing you to switch out the solar panels for two AA batteries (not included), depending on the strength of sunlight. You can even use the solar panel to charge up your own rechargeable AA batteries. The solar panels are positionable, so you can maximize their exposure to the sun to generate the most power.