I don't think this set is very good. The little motor wires kept snapping off the motor. The only way to fix this is to extend the wire and twist it around the motor. Also, The windmill fins kept coming off. The hand-held power generator gears don't stay inside the holes inside the box. The snaps to hold the power connectors are hard to snap in. Other than that the solar panel works perfectly.
(Posted on 2/20/12)