Taking my cue from our grammar memory work this week, our science fact can also be put to "Ring Around the Rosie."
Here's a good overview of geysers along with a couple of videos from geology.com, and a coloring page for those kids who can't get enough of their Crayolas.
You can also see helpful animation on how geysers work. Some kids might appreciate this "electronic field trip" to Yellowstone, too.
Wanna make your own geyser? Here's an idea using Alka-Seltzer and a two-liter bottle, or you can go the Coke-and-Mentos route.