Build your own solar kit with these kits Six different working models including Solar Revolving Plane, Solar Windmill, Solar Plane, Solar Airboat, Solar Puppy, Solar Car Only one project can be completed at a time Great assembling toy for children to practice and empower their brain as well as becoming educated with the benefits of solar energy Also ideal to express your childs' interest in science, extremely helpful for your children on creative thinking Solar powered, fun to play with and requires no batteries Easy to assemble by following the step in instruction To perform great results please use under direct sunlight For best results use outside in direct sunlight The kit will not work in cloudy or shady locations or under a fluorescent light The kit will not work if built wrong Product Specifications: Color: Green with White as shown in the picture Net Weight: 82g Work life of Solar Battery: 3-5 years approx. Package Contents: 1 x Robot Kits 1 x User Manual