This one-hour special marks the 20th anniversary of Sesame Street, the ground-breaking educational children's series that has taught numbers and the alphabet, along with social and cultural concepts, to generations of preschoolers.
Overview：This one-hour special marks the 20th anniversary of Sesame Street, the ground-breaking educational children's series that has taught numbers and the alphabet, along with social and cultural concepts, to generations of preschoolers.
