How Old Is Caillous Sister

Rosie (French name: Mousseline) – Caillou’s lively younger sister who is a typical toddler. She is two years old.

Is Rosie from Caillou adopted?

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.

Did Caillou pinch his sister?

Caillou furiously pinching Rosie’s cheek, however, is less harmful than what he does in the original book that the episode is based on, where he gets even more violent and angrily bites Rosie. This was the first episode ever to be banned.