Build a Cable-Stayed Bridge

Design Challenge: Make a large-scale model of a cable-stayed bridge that is put together like a real one, with bridge segments hanging from two towers.

Windy City Tower

Design Challenge: Make a paper tower that can withstand as much wind as possible, without sliding or toppling over

Designing Highway Interchanges

Design Challenge: Design a highway interchange that allows drivers to approach from any highway and leave by any highway without crossing any lanes of traffic.