These are some links to sites that have good information regarding dinosaurs as well as other information relating to pre-historic eras on Earth.
1. Information relating to dinosarus and asteroids http://www.cotf.edu/ete/modules/msese/dinosaurflr/meet.html
2. Discovering Dinosaurs (Britannica) http://search.eb.com/dinosaurs/dinosaurs/study/index.htm
3. Walking with Dinosaurs http://www.abc.net.au/dinosaurs/fact_files/glossary_a_b.htm
4. Exploratons through time http://www.ucmp.berkeley.edu/education/explotime.html
5. Un-museum of dinosaurs http://unmuseum.mus.pa.us/deaddino.htm
6. Earth's Craters http://www.cotf.edu/ete/modules/msese/dinosaurflr/ecraters.html
7. What is a dinosaur and other exciting things. http://www.enchantedlearning.com/subjects/dinosaurs/
8. Yahooligans! Dinosaurs http://yahooligans.yahoo.com/content/science/dinosaurs/a.html
9. Dinosaur Pictures http://www.search4dinosaurs.com/pictures.html
10. More Dinosaur Pictures http://www.prehistory.com/colorchr.htm
11. Even More Dinosaur Pictures http://easyweb.easynet.co.uk/~skafi/pics.htm
12. Dino games. http://www.kidsdomain.com/games/dino.html
13. Scavenger hunt http://www.cabarrus.k12.nc.us/bethel/dinosaurscavhunt.html
14. Hunt http://www.campsilos.org/mod3/students/hunt.shtml
15. What is a Dinosaur? http://www.enchantedlearning.com/subjects/dinosaurs/
16. Who wants to be a paleontologist? Paleontologist
Have a pre-historic day!