I just discovered the U.S. Geological Survey Kids Site. It has everything from coloring and connect-the-dot pages to mazes and crossword puzzles for elementary age children. Check it out. http://education.usgs.gov/kids/index.html
For older children and teachers, this link has teaching points, activities and science lesson plans for elementary, secondary, and undergraduate students. http://education.usgs.gov/primary.html
Lots of things to intrigue and spark curiosity.