Go green and bring STEM concepts to life with the K'NEX® Investigating Solar Energy Set! Learn how to harness the energy of the sun into electricity to power K'NEX models. Builds three models and Includes 128 K'NEX parts, solar panel and motor. Building instructions and teacher's guide aligned to National STEM Standards included. Teacher guide provides a program of study that uses hands-on exploration in conjunction with an engaging inquiry-based approach to learning. Students are encouraged to build, investigate, and evaluate concepts, ideas and designs.