2 is a number in the Arabic Numeral System—the most widely used numeral system in the world. Along with the letters E, S, W and the number 3, the number 2 sponsored the first episode of Sesame Street. Furthermore, the number 2, along with the letter D, sponsored the first Sesame Street test show.

In the first episode of Sesame Street, Ernie revealed that his favorite number was 2.

In the Dinosaurs episode "Baby Talk", a law is passed which includes changing the number 2 to "Not 1".

Songs about 2

Skits about 2

Plaza Sésamo Segments

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