Kottke linked one of my favorite things from my childhood, and I don't think I've seen it since: Sesame Street: Geometry of Circles, music by Philip Glass.
This is BrainLog, a blog by Dan Sanderson. Older entries, from October 1999 through September 2010, are preserved for posterity, but are no longer maintained. See the front page and newer entries.
October 5, 2009