7 - in - 1 Educational Rechargeable Solar E Kit is especially designed for children. It helps the kids to learn how solar energy can be employed to drive a small motor, or to recharge micro battery. This kit comprises of 4 wheels, 1 motor accompanied by PC board, 2 sponges, 1 battery case, 1 gear with shaft, 1 rechargeable battery, 1 solar panel, 1 shaft along with 2 trays of plastic parts. The best fact about this toy is that it works both on solar energy as well as on batteries. These components are very easy to assemble. Kids will enjoy while assembling the parts. Another interesting fact about this toy is that no additional tool or accessory is required for assembling the parts. It's a great toy to be used for school projects. Annie Educational Rechargeable Solar E Kit keeps the students or kids engaged for a long period of time