Dissection of a cow eyeball http://www.exploratorium.edu/learning_studio/cow_eye/
Optical Illusions http://kids.niehs.nih.gov/illusion/illusions.htm
Frog dissection http://www.ofsd.k12.wi.us/science/frogdiss.htm
interactive frog dissection Click on "Demo" http://www.froguts.com/flash_content/index.html
interactive surgeries http://www.edheads.org/
Space Shuttle Orbital Tracking/Sighting http://spaceflight.nasa.gov/realdata/sightings/cities/view.cgi
Energy Resources http://www.eia.doe.gov/kids/energyfacts/index.html
Another great - Energy Resources http://www.darvill.clara.net/altenerg/index.htm
Earth Day Info. http://www.epa.gov/earthday/
Texas Wildflower identification http://www.lone-star.net/wildflowers/flowers.htm