This is my Basic CSS Box Model Demo, inspired by the good Jon Hicks. Basically, drag the scrolly thing, and you get to see the padding/margins thing in faux-3D. The W3C diagram looks like this I first fully understood the box model when I saw this page at Brain Jar. To date, that is the best demonstration of how this all should work that I've seen. Read it all. Normally I would do this sort of