Our newest module, Gears, Sprockets & Chains expands the “engineering go power” of the base Structures module. Gears and chains (like the ones in bicycles) are simple machines. When students learn to design and build with gears they gain hands-on understanding of the principles of motion. Five PreK-6 lessons are available for specific use with this module. Each activity is focused on solving real-world challenges using creativity and problem-based learning approach. 503 pieces. Grades K+.