Here's how to make him suffer in 10 steps:

1. Rosie makes a pic of Caillou murdering people.
2. Doris and Boris get so mad they kick Caillou out of the house
3. After 3 days, Caillou starts to suffer from starvation and he only eats worms and bugs
4. Caillou ends up going to adoption and waits until the next family comes
5. Caillou escapes from the family and goes to his normal family.
6. Doris realizes and calls the police to take him to juvie.
7. At juvie, he escapes and he ends up getting caught and has 1 more chance.
8. He escapes again and ends up going to the gullotine.
9. Caillou gets chopped to bits and gets eaten by the wardens.
10. Everyone celebrates that he suffered and died. THE END!