This deluxe set builds working models of a house, a pyramid and various types of bridges (beam, arch, truss, cable-stayed and suspension) along with huge models of the world-famous Eiffel Tower in France (59" tall) and the Sydney Harbor Bridge in Australia (56" in length)! Builders will be immersed in discovering how triangulation provides strength on a building, the main types of forces acting on structures, how trusses work, and the major types of cable bridges.