Interactive Activity http://www.Brainpop.com
Foss Science: Land Formations http://www.fossweb.com/modules3-6/Landforms/index.html
EnviroMapper - create your own maps, down to the square mile, anywhere in America, choosing various features-- from water discharges to hazardous waste. http://TerraWeb.wr.usgs.gov/TRS/kids
Terraserver - Aerial photographs, satellite images, and topographic maps of almost anywhere in the world. http://terraserver.microsoft.com