The music of American composer Philip Glass, who is known for “music with repetitive structures”, is frequently used for dance. In fact, some of my favorite works include a Glass score, such as Jerome Robbins’ Glass Pieces and Twyla Tharp’s In the Upper Room. However, my first exposure to Glass was not at a dance performance, nor was it while watching one of the many feature films accompanied by an original Glass score. My first encounter with Glass was on “Sesame Street”. Before I even knew who Glass was, I heard his music in an animation series called “Geometry of Circles”, which first appeared on “Sesame Street” in 1979 and continued throughout the 80s – when I was watching. Glass created the short vocal and instrumental pieces specifically for the children’s television show. To this day, I find the combination of bright colors, geometric shapes, and repetitive sound to be pretty mesmerizing. By now, “Sesame Street” has probably (and unfortunately) replaced “Geometry of Circles” with more high-tech features to teach children about colors, circles, and music. I consider myself lucky to have first heard Glass while still wearing diapers.