Over 20 experiment kits to learn about the principles of solar power generation. - Product Name: Solar Plane & Solar Power Experiment - Number of Experiments: Over 20 - Target Age: Elementary school students and up - Contents: Solar panel, motor, propeller, etc. - Learning Content: Principles of solar power generation - Kit Type: Assembly kit - Manufacturer: Gakken Thank you for viewing. Unopened and unused, it has been stored for a long time. As this is an item for you to assemble yourself, there is no guarantee of operation.