See the article at: http://www.washingtonpost.com/wp-dyn/content/article/2009/02/17/AR2009021702877.html
It's a great piece - designed to pique kids' interest in engineering and its practical applications. My seven-year-old daughter read it without me even having to ask her. (She was also pretty excited that I would get to see Nate use his "rapid ascender" in Louisville).
See MUCH more about National Engineers Week at: http://www.eweek.org/Home.aspx