5 electronic circuits included: 1 solar panel, 1 car, 1 battery bank and 2 wires; Plus an assembly manual. * Excellent for demonstrating solar power in action * Eight configurations that show how the car works with and w/o batteries * 10.3 x 2.1 x 7.7 inches;12 ounces * 8 easy snap-on models to play with this kit. Very good cpmbination of solar learning and outdoor fun for 5+.