Vktech&reg; Solar Powere DIY Jigsaw Wood Winnower Kits Windmill Puzzle Child Educationa DIY wooden 3D puzzle. Green material to ensure safety. Knowledge of structure mechanics and solar energy After assembling, put it in the sunlight and see how the motors activate by the solar power Fun, educational, simple model. A fun demonstration of solar energy .Outstanding Home School Lesson Kit - Imagination, Education, DIY Accomplishment Fun Solar cells and motors included. Suitable for 6 years and upwards It's a great gift for your child, for your friend, for your client, and everyone who is interested in this product