Designed to introduce students to the scientific concepts associated with two types of simple machines - wheels and axles and inclined planes. Students build, investigate and evaluate scientific principles in action. Set includes 221 K'NEX parts enough to build 7 fully-functioning replicas of real-world machines, one at a time. Packaged in a strong storage tray with snap-on lid. Supports 2 - 3 students working as a team. Includes building instructions and comprehensive teacher's guide on CD, aligned to Science, Technology, Engineering and Math standards for Key stage 1 and 2.