On the one hand, it's not clear to me whether Mike Stanfill has permission to provide Tom Lehrer's song "The Elements" as a Flash animation online. On the other hand, it's so charming that I'm having a hard time faulting him for it. And he does provide links to buy Lehrer's recordings and songbook from Amazon.
But I'd like it even more if there were more cute bits specific to individual elements.
Thanks to Rebecca S. for the link.