I haven't mentioned this website yet which is just plain wrong. I found Cockeyed about a month or so ago, and it's easily one of the best websites I've ever seen. Page after page of goofy science experiments, bizarre construction projects and the famous 'how much is inside?' demonstrations, the stories of which are told by the inimitable (and sharp-witted) Rob Cockerham (a modern-day Richard Feynman). There's over 500 megabytes of extremely entertaining content on the site but amazing I've already read through ALL of it. It's that good. And frankly I stole the whole format for the t-shirt page from it.