Structural engineers use physics and their knowledge of the properties of building materials and geometric shapes to design structures with sufficient strength and stability. Build 20 different models that each teach about force, load, compression, tension and more Over 285 interchangeable building pieces Includes 36-page, illustrated experiment manual and Assembly guide Skill level: Intermediate Do you ever wonder how bridges span huge distances and how skyscrapers stay standing? With this kit of modular building pieces, you can learn the basics of structural engineering by conducting a series of 20 model-building experiments.