4M Windmill Generator - Green Science, Green Energy by 4M Kidz Labs Fun Science Products 4M Kidz Labs Fun Science Products. Windmill Generator - Green Science for Green Energy by 4M Kidz Labs Fun Science Products Windmill Generator is a must have 4M science kit in the ""Green Science"" series, your future scientist can help save the planet by recycling a plastic bottle to support their wind generator!Windmill Generator feature fun projects like building this amazing wind generator and learn about renewable energy. Watch the LED glow as it is powered by free energy from the wind! No batteries are required. - Help save the planet by recycling a plastic bottleto support your wind generator.Windmill Generator - Green Science, Green Energy is an age appropriate toy for children 8 years and older.
