Caillou is a Canadian animated children's series based on books by Christine L'Heureux, first broadcast in 1997 and later shown in the United States on PBS Kids and Sprout. Produced in its early years by CINAR, the show follows a four year old boy through everyday family situations. Clips of Caillou have circulated widely as memes, with his whiny or defiant lines isolated as reaction sounds. This short no became popular for edits because the delivery captures childhood stubbornness in a single word that viewers instantly recognise.