The Forces, Energy & Motion set offers an exciting, hands on opportunity to address fundamental physical science concepts. The set includes 4 spring motors, plus instructions to build 4 of any one of these models simultaneously: rubberband roller, rubber band racer, spring motor turbo. Includes an 80-page Educator Guide with 8 extensive lesson plans. Supports 12-16 students working in teams of 3-4. Grades 5 - 8.