New season of Sesame Street premiering Monday Sept 26th 2011! New episodes weekday mornings on PBS! (Check local listings.) For more videos and games check out our new website at www.sesamestreet.org In this video different celebrities sing their A, B, C's. Sesame Street is a production of Sesame Workshop, a nonprofit educational organization which also produces Pinky Dinky Doo, The Electric Company, and other programs for children around the world.