Caillou was initially created as a baby of nine months. When it was time for him to get older, the addition of hair made him unrecognizable. So it was decided that Caillou would never have any hair, and he went on to become famous as a bald little boy.

Does Caillou deserve hair?

DC Fandome - The Loop. "Caillou is a despicable, spineless 4-year-old boy who cannot do anything. He can't grow hair, not because he has cancer or progeria, but because he sucks, and even his own body recognizes that he does not deserve hair or food or love.

Why does Caillou have no hair listen?

Based on the books created by Chouette Publishing, Caillou was initially created as a nine month old baby. As he grew older, the publisher & show producers found that he became unrecognizable with the addition of hair and therefore decided to keep his recogniton.