NASA for middle-school students http://www.nasa.gov/audience/forstudents/5-8/features/index.html
Future City http://www.futurecity.org
Westpoint Bridge Builder http://bridgecontest.usma.edu/
PBS Building Big! Go to the forces lab. http://www.pbs.org/wgbh/buildingbig/
Cool Place to Shop http://www.towerhobby.com
Robot Magazine http://www.botmag.com/index.shtml
I keep book marks.
Make Magazine http://www.makezine.com/
New York DEC NYSDEC
Cabelas sporting goods
Great website with fish descriptions and info Fish Information