I had been introduced to this site quite awhile ago. However, I'm ashamed to admit we had never vhttp://www.blogger.com/img/gl.link.gifisited it, even with the links coming in my inbox. Today we went on the website and learned about the center of gravity. I know this is definately going to be one of those sites that we visit very frequently. I am not the greatest at science, but this was something very easy to understand and learn. Yeah for Robert Krampf and all his hard work. You can visit his site here .