Caillou coloring pages. In this section you will find a children’s coloring pages of the educational children’s television series Caillou. Opening coloring page with Caillou, you will be able to print it or save it to disk. All Caillou coloring pictures are free. Caillou is the main character of the cartoon series about a four-year old Canadian boy who is bald. He has a mother Doris, father Boris, sister named Rosie and a cat named Gilbert. The cartoon follows Caillou’s adventures.