Caillou is a Canadian educational children's television series that was first shown on Teletoon with the first episode airing on the former channel on September 15, 1997 the show later moved to Treehouse TV with its final episode being shown on that channel on October 3, 2010. The series is based on the books by Hélène Desputeaux. Produced by DHX Media It centers on a 4-year-old named Caillou who is fasc by the world around him.
Aimed at the toddler and pre-school set, "Caillou" is an educational show that stars the 4-year-old title character (pronounced KY-YOO), who lives with his mother, father and sister in a blue house on Pine Street. Caillou has invisible friends, learns how to play sports and explores nature. Friendly and curious, Caillou discovers as much fun and wonder as any kid can imagine. In addition to the animated segments featuring Caillou's adventures, the show also features puppet skits and videos of children in real-life situations.
It started airing in 2000 on the old PBS Kids channel. It started airing in 2005 on Sprout (now known as Universal Kids) when it replaced the old PBS Kids channel after it shutdown and ended reruns on Universal Kids on April 1, 2019 when its rights expired. Then it started showing on the new PBS Kids channel in January 2017, making the new PBS Kids channel the only channel where Caillou can be seen.
Starting June 1, 2020, Caillou will no longer be on weekdays at 12:30 PM on the PBS Kids channel, with its timeslot being replaced with Arthur. However, it will be on weekends (Saturday and Sunday) on the same channel starting June 6, 2020.