The 1944 film Chip Off the Old Block, starring Donald O'Connor, Peggy Ryan and Ann Blyth, featured Kupperman as the "Quiz Kid", representative of the group.
[2] During his initial Quiz Kids shows, Kupperman, who was then 7, lisped, which emphasized his youth and endeared him to the listening audience.
[3] In one episode of Quiz Kids, Joel showed his ability to multiply any number times 99 "in his head."
He developed an interest in Asian philosophy, through which he found a mentor: a visiting professor who advised him to leave the United States.
[10] In 2018, Simon & Schuster published All the Answers, a graphic memoir by Michael Kupperman on his father Joel's rise to fame and his subsequent retreat from public life.