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Official Site: WildBrain

Caillou ( ) is a Canadian educational children's television series which aired on Teletoon (both English and French versions), with its first episode airing on the former channel on September 15, 1997; it later moved to Treehouse TV, with its final episode being shown on that channel on October 3, 2010. It was produced in Canada by the CINAR Corporation (later Cookie Jar Entertainment), In season 5, it was animated by the South African studio Clockwork Zoo. Based on the books by Hélène Desputeaux, it focuses on a four-year-old boy named Caillou who is fascinated by the world around him.

A computer-animated reboot series is set to premiere on Peacock in 2023.

Caillou lives with his mother, father, and younger sister, Rosie. He has many adventures with his family and friends, and uses his imagination in every episode.

Each episode in seasons 1 through 3 has a theme and is divided into several short sections that mix animation, puppet skits, and video of live-action children in real-life situations. In seasons 4 and 5, the episodes are divided into three short sections; the puppet segment was dropped, alongside the "Real Kids" version of the segment.

Caillou has not been a contender in any CBUB matches.