STEM Solar Kit STEM construction kit through which children playfully acquire their first knowledge about renewable energy. The solar rotor, a combination of solar cell and motor, is the central piece of the three models and makes the propeller rotate using the power of the sun. The helicopter, inflatable boat and fan models are set in motion using solar energy. The included FischertechNik figure brings extra fun. Powered by solar energy Functional solar rotor Contains 80 pieces, assembly instructions. Recommended age: +7 years. Made of plastic and metal. According to EN71&ASTM regulations. WARNING: Not suitable for children under 3 years, contains small parts. Adult supervision is recommended during play. Read the instructions before use, follow them and keep them for reference. Made in Germany by Fischertechnik