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Caillou (/ k ɑː j ʊ,-j uː / kah-yuu, -⁠yoo; French:, stylized in lowercase) is an animated educational children's television series that aired on Teletoon (both English and French versions) – with the first episode airing on the former channel on September 15, 1997 – until the fourth season.

Caillou: With Evan Smirnow, Ellen David, Daniel Brochu, Jennifer Seguin. An imaginative four-year-old boy learns life lessons and discovers new things with his friends and family.

Watch Caillou videos and clips with your little one on your computer, smartphone, or tablet!

Source. Caillou is a 4-year-old boy who serves as the main protagonist of the TV series and books, all of the same name. He is presented as a curious, adventurous young child who enjoys exploring the world around him and is intended to be a representation of a real preschooler.

Caillou (/ k ɑː j ʊ,-j uː / kah-yuu, -⁠yoo; French: , stylized in lowercase) is an animated educational children's television series.. Based on the books by Hélène Desputeaux, [1] [2] it focuses on a four-year-old boy named Caillou who is fascinated by the world around him.