Wheels are everywhere in a student's life! From the wheels on a bike to the mechanism inside door knobs, students discover how wheels and axles use friction to easily move objects. They also find out how the size of a wheel impacts movement. As lessons progress, students experiment with force using inclined planes at various degrees and see how wedges are convenient tools for everyday life. Step-by-step instruction guides students through the building process of 14 models and explain their relationship to certain scientific principles. Kit includes 134 pieces. Recommended for Elementary and up.