Emily Perl Kingsley (b. 1940) is a writer who joined the Sesame Street team in 1970, and retired in 2015.[1] Her son, Jason, was born with Down syndrome in 1974. She wrote a widely read article on the subject, "Welcome to Holland," in 1987, and has been an activist for children with special needs for over 30 years. Her son's story became the topic of an hour-long NBC special in 1977, titled This Is My Son, and Jason co-wrote the book Count Us In: Growing Up With Down Syndrome. By 1981, the duo w