Geometry of Circles (1979) with Sesame Street and Philip Glass

Above, the classic collaboration between Sesame Street and Philip Glass entitled Geometry of Circles. Via Brain Pickings:

In 1979, the makers of Sesame Street commissioned Philip Glass to compose music for a series of four unnumbered animation pieces titled Geometry of Circles, designed as a primer for visual thinking — something at the core of both Sesame Street itself and Jim Henson’s original vision that predated his creation of The Muppets.

And here’s a shortened high quality version:

There are more Sesame Street videos on this site.

Thanks, Jason.