How old is Caillou?

How old is Caillou? Caillou is a 4-year old boy, the main character, and the main protagonist of the TV series and the 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 is a 4-year old boy, the main character, and the main protagonist of the TV series and the 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.
See also  Is Fire Emblem a Pokemon Conquest?