Forsche mit uns! Windrad aus einer PET-Flasche

A windmill made from a plastic bottle is not only quick and easy to build, but with this beautiful garden decoration you can also explore the power of the wind. Build windmills with different numbers of blades, vary the blade length, and test different blade shapes. This is the perfect way to learn about the most important alternative energy sources – in this case, wind. New videos every Friday! Society for Environmental Education Baden-Württemberg e.V. http://www.gub-bw.de/