Mitch Fincher, a civil engineering student, has a website where he shows the viewer how to construct a bridge and various types of towers (the spiral one is awesome) using only pennies.
Here are a few items from our collection to help you get started on your own adult/child building project:
Salvadori, Mario. The Art of Construction: Projects and Principles for Beginning Engineers and Architects. [J 624.177 SAL]
The Ultimate LEGO Book. [J 688.7 ULT]
Walker, Lester. Block Building for Children. [790.1 WAL]