From a seesaw and wheelbarrow to a parking gate and an extendable arm, students build 16 working models to witness levers in action. They discover the relationship between the fulcrum, effort, and load through hands-on learning. Students also create examples of the three classes of levers and learn how linking them together creates complex motion. An easy-to-follow booklet guides them through the process and provides a detailed explanation of the scientific principles applied. Kit includes 106 pieces. Recommended for Elementary and up.