Jason Kingsley (b. 1974) is the son of writer Emily Perl Kingsley. He made his first appearance in 1975, and according to the book Street Gang, Kingsley appeared in over 50 episodes of Sesame Street.
Kingsley appeared in several Muppet & Kid Moments. He also co-wrote the lyrics to "Count Me In" with his mother. In 2004, his contribution to My Favorite Sesame Street Moments aired before Episode 4072.
Jason Kingsley is the co-author with Marshall Levitz of Count Us In: Growing Up With Down Syndrome. In 1997, he appeared alongside Chris Boyd in a Down syndrome-themed episode of Touched by an Angel.
- Cookie Monster asks Jason to read a sign that says "Dog".
- Ernie and Jason talk about words that end with "At", including "cat", "hat", and "sat".
- Ernie and Jason look at a mirror.
- Jason and Cookie Monster spell the word "love".