Designed to introduce students to the scientific concepts associated with two types of simple machines -levers and pulleys. New skills can be acquired as students work together to build, investigate, discuss and evaluate scientific principles in action. Set includes 178 K'NEX parts, which can build 8 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.