Materials Needed: String, lightweight materials (plastic or foam), toy rockets, and a base.Concept: Construct a model of a space elevator, consisting of a long cable extending from the Earth's surface to space. Use a pulley system to demonstrate how payloads can be lifted along the cable.Educational Focus: Discuss the science behind space elevators, including materials like carbon nanotubes or graphene that could make the concept feasible. Explain how space elevators could reduce the cost of sending cargo and people into space compared to conventional rockets.