Interactive Forces Lab http://www.pbs.org/wgbh/buildingbig/lab/index.html
PBS Building Big http://www.pbs.org/wgbh/buildingbig/
Skyscrapers: Cool Stuff for Kids http://www.skyscraper.org/WHAT'S_UP/COOL_STUFF/coolstuff.htm
Taipei 101 http://deputy-dog.com/2008/06/in-action-skyscrapers-amazing-728-ton.html