The revolutionary children’s television program "Sesame Street" has been teaching kids more than their 123’s and ABC’s since its inception in 1969. Grover taught kids it’s okay to be alone, and Mr. Snuffleupugus demonstrated that friends come in all shapes and sizes, including invisible. When Will Lee, the actor who played Mr. Hooper, shopkeeper and friend to Big Bird, passed away, the show took on the topic of grief. About a decade ago, young fans were introduced to Julia, a puppet who has autism.