Cancer theory

Why is Caillou bald? People have wondered about this ever since Caillou was a thing. And why are his parents always so calm? Why is he so whiny? Either his parents are obsessed with his looks, or secretly abuse him by shaving his head.

This theory says Caillou is actually a toddler with cancer. The reason why there's always a white frame border in the show is because Caillou is on his death bed and the stories are Caillou's fantasies of his ideal life or just flashbacks. Caillou's cancer could also be the reason his parents spoil him because they want to give him happy memories before he passes away and they feel guilty of punishing him because of his disease.

Or in another way, Caillou died before the series started and the narrator is simply telling stories of her grandson to the two kids.

Éditions Chouette have mentioned that the true reason Caillou is bald is because he originally was an infant in the books, and they wanted to keep him recognizable to children.

Furthermore, the original voice actress of Caillou,Jacklyn Linetsky, died in a car crash in 2003

Rosie the Narrator

This theory focuses on the possibility that the narrator is actually an older version of Rosie, in which she is telling stories of her brother to her children (or grandchildren). There are numerous reasons to support this theory. Firstly the narrator is quoted as saying “this story happened when caillou was 3” prompting the fact that Caillou was indeed a real person.

Redhead Theory

Caillou Conspiracy Theory

Caillou Conspiracy Theory


  • Rosie has orange hair either because she's adopted and Caillou's parents did not want to get another child like Caillou, or one of the parents was more of a redhead when they were younger and their hair became darker over time. Or possibly Rosie's "gingerness" could have been passed by her grandparents, but none of these theories have evidence.