Caillou is a chilren's television show based on the books by Christine L'Heureux and illustrator Hélène Desputeaux. Many of the stories in the animated version begin with a teacher (who's also the show's narrator) introducing the story to her students, then reading the story out of the book. Caillou first aired on Canada's Teletoon channel in 1998; it later made its US debut on PBS on September 4, 2000.