Includes 178 colorful parts to make eight different replicas of real world simple machines Accommodates 2-3 students working as a team and appropriate for elementary classrooms in grades 3 through 5 STEM Concepts: making work easier, mechanical advantage, effort arm, fulcrum, lever classes, pulley systems and more Packaged in a reusable plastic storage tray with a snap-on lid for quick clean-up and easy storage Building with K'NEX puts children on a path towards a fundamental understanding of STEAM/STEM subjects. K'NEX Education sets come with lesson plans and experiment guides written by educators that feature hands-on, inquiry-based projects. All teacher guides and experiment guides are aligned to national standards, including ITEEA, NSES, NCTM, NGSS and Common Core. K'NEX Education sets let students build replicas of real-world machines to gain an understanding of the principles that make them work. Introduces students to the scientific concepts associated with levers and pulleys Builds 8 fully-functioning replicas of real-world machines, one at a time Includes 178 K'NEX pieces packaged in a strong storage tub with Snap-on lid Building instructions and comprehensive teacher's guide CD included For 3rd through 5th grade classrooms ,AGE : 8+ Adheres to many Common Core Standards, found below Great for learning