The Science Museum of Minnesota offers the extensive Welcome to the Thinking Fountain educational Web site. The many science activities provided on the site include: Bubbles, chromatography, density, friction, inventions, optics, light, recycling, and more. Visitors to the site can browse the activities alphabetically or by theme cluster, or can click on the interactive graphic on the main page. This site does a good job of providing quality lessons for science students in various grade levels; lessons that, besides being fun to complete, also help explain some of the more confusing science topics students confront.