Cool couple who sell a number of "green science" kits and products. They also have a number of instructional videos about various projects and technology. Fun to watch. Here is their ebay store.

Green Power Science is dedicated to the backyard scientist. Our belief is that some of the smartest people in the world discover the best things through trial and error IN THEIR OWN BACKYARDS OR GARAGES. We welcome all levels of creativity and hope you find the answers you are looking for.