Designed to introduce students to the scientific concepts associated with gears. New skills can be acquired as students build, investigate, discuss and evaluate scientific principles in action. Set includes 198 K'NEX parts, enough to build 7 fully-functioning replicas of real-world machines, one at a time. Supports 2 - 3 students working as a team. Packaged in a strong storage tray with snap-on lid. Includes building instructions and comprehensive teacher's guide on CD, aligned to Science, Technology, Engineering and Math standards for Key stage 1 and 2.