Grades 3 - 5 -

You can build 7 different replicas of real-world models, one at a time, with the K'Nex Introduction to Simple Machines: Wheels, Axels and Inclined Planes kit. 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. Comes packaged in a strong plastic storage case with dividers and transparent lockable lid.