K'NEX Education - Investigating Solar Energy Set Build 3 fully-functioning replicas of real-world solar energy systems (up to 2 at a time) Provides hands-on study of solar power and the process of scientific inquiry Includes 128 K'NEX parts, solar panel, and motor, all packaged in a convenient storage box Designed for grades 5-9; includes building instructions and comprehensive Teacher's Guide Aligned to STEM (science, technology, engineering, and math) concepts national standards