Thanks for posting this. This is one of my favorite series. The guy who does the presentation is the quintessential engineer. This is great geek stuff.
I loved this series as a kid, and for some reason, also really liked the theme music -- it's "Take 5" by Dave Brubeck.
The theme music was actually Val Bennett's "The Russians are Coming", a version of Brubeck's Take Five. It's been permanently stuck in my head since I first saw this series years ago.
Uh oh. These got popular before, & the Exploratorium site got overwhelmed. So, check out the torrents.