This exciting add-on set for 9686 allows students to learn all about renewable energy sources, and is both compatible with the Machines and Mechanisms portfolio and LEGO® MINDSTORMS Education. The set features a solar panel, turbine blades, a motor/generator, LED lights, an extension wire and the unique LEGO Energy Meter. The set includes full-colour building instructions for six real-life LEGO® models - designed for use with 9686 and work great as inspiration for MINDSTORMS.