Promote problem solving and teach students about forces on real-world structures. Learners collaborate to build structures and discover how real-world engineers take external forces into account. Students are challenged to create bridges and towers with toothpicks, string, and Hex-a-link cubes, then test their work in terms of strength and stability! An included spring gauge measures the amount of force their structures can bear before it comes crashing down. Students improve critical thinking skills by innovating upon their designs during this iterative approach to learning. Kit includes detailed activity guide and enough materials for one group of students. Recommended for Middle School and up.