I might suggest you contact the National Building Museum in Washington,
DC. They have a wide array of exhibitions on architecture and
engineering design. Their general phone number is 202/272-2448.

Another architecture exhibit I saw a couple years ago is at the Maryland
Science Center in Baltimore, Maryland. It had some effective interactive
exhibits that demonstrated variety of engineering issues such as how
arches and flying buttresses work.

Good luck with your project.

Bruce Underwood
Ofc of Elementary & Secondary Education
Smithsonian Institution
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Bruce Underwood               Ofc of Elem & Secondary Education
Education Specialist          A&I 1163, MRC 402
Smithsonian Institution       Washington, DC    20560
202/357-4542; 357-4908-fax    e-mail: [log in to unmask]