This site has a good introduction to earthquakes and seismographs. http://www.thetech.org/exhibits_events/online/quakes/overview/
Be a seismologist and view a virtual earthquake. http://vcourseware3.calstatela.edu/VirtualEarthquake/VQuakeExecute.html
Earthquake and Tsunami information http://walrus.wr.usgs.gov/tsunami/
Earthquake information for kids http://earthquake.usgs.gov/4kids/
Killer Waves - Tsunami http://www.nationalgeographic.com/ngkids/9610/kwave/index.html
A Tsunami Story http://www.fema.gov/kids/tsunami/
Earthquake Photos http://earthquake.usgs.gov/learning/photos.php
This site has fun things for kids about earthquakes. http://www.fema.gov/kids/quake.htm
Take an earthquake quiz! http://www.abag.ca.gov/bayarea/eqmaps/kids.html
Earthquake Facts http://earthquake.usgs.gov/learning/facts.php
Today in Earthquake History http://earthquake.usgs.gov/
Earthquake Animations http://www.wwnorton.com/college/geo/egeo/animations/ch8.htm#1