Caillou was first shown in the episode "Caillou Makes Cookies", which aired in 1997. Based on the books by Hélène Desputeaux, it focuses on a four-year-old boy who is fascinated by the world around him. In 2023, it was announced that the show would be rebooted. It was originally set to premiere on Peacock with 52 eleven-minute episodes some time in 2023.