See science concepts in action with the K'NEX Education STEM Explorations Levers and Pulleys Building Set!. 139 parts to build unique, fully-functioning replicas of real-world models: a balance, a wheelbarrow, and a sailboat. Includes 3 after-build experiments that teach about STEM concepts like lever classes, pulley systems, effort and more. Accommodates 1-2 students, working as a team - a perfect solution for home-school families. Easy-to-follow, step-by-step building instructions included. 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 curricula. K'NEX Education sets let students build replicas of real-world machines to gain an understanding of the principles that make them work.