Elenco’s Snap Circuits Green Energy STEM building kit teaches the fundamentals of building electronic circuits and how they interact with various green energy technologies. Snap Circuits unique technology uses building blocks with snaps to build the different electrical circuits. Each block has a function including switch blocks, light blocks, battery blocks, and different length wire blocks. These blocks are colored and numbered to make them easy to identify during the building process. Kids will have hours of fun creating over 125 different circuit projects and learning about alternative energy including wind, solar, water and other green energy sources with this STEM building set. Green energy parts include the base grid, snap and jumper wires, battery, solar cell, liquid holder and electrodes, meter, motor, wind fan, water wheel, geared motor and crank arm, switches, LED’s, capacitor, and all other parts. The color-coded and detailed instruction sheets provide step-by-step directions on each project, making learning both easy and fun. With this electronic building set, kids will learn about electricity, building circuits, and the use of alternative green energy sources. Ages 8 years and up Elenco's Snap Circuits makes learning electronics easy, educational, and fun! They are endorsed by educators worldwide and used in schools, libraries, museums, and STEM educational programs. Snap Circuit’s patented Circuit Safe technology is unique to Snap Circuits branded products, makes learning circuitry safe. Snap Circuits products are well known for their commitment to education have won many awards, including Toy of the Year (TOTY), ASTRA'S Best Toys for Kids, Parent's Choice Recommended, Good Housekeeping's Best Toy, Family Choice, National Parenting Publications Awards (NAPPA Gold), Children's Choice, Dr. Toy (100 Best Children's Products, 10 best Educational Products, Green Toy Company), KAPi Award, and the inaugural Seriously STEM Award.