KNEX WHEELS & AXLES AND INCLINED

Build 7 different replicas of real-world models, one at a time. Set includes building instructions with real-life photos and key facts for each model. Models demonstrate how a wheel turns an axle, how an axle turns a wheel, 2 levels of inclined planes, the screw and a wedge. 221 pieces support 2-3 students working in a team. Grades 3 - 5