Caillou gets grounded because he eats too much at Chuck E. Cheese.
Caillou: I'm going to Chuck E. Cheese.
Clerk: What can I get you?
Caillou: I'll have 100 pizzas with 10 sodas.
Clerk: Here you go.
Caillou: That was the best meal ever.
(Caillou gets fat)
Caillou: Oh no! I am fat!
Rosie: Oh my god, Caillou! How dare you sneak into Chuck E Cheese and get fat! How could you?
Caillou: I'm sorry Mom, Dad and Rosie. I was hungry.
Rosie: Well, it doesn't matter!
Boris: You are grounded for 12121212 years!
Doris: This means no Chuck E Cheese forever!
Rosie: Go to your room now!
Caillou (running upstairs): Waaaaaaaaaaaaaaaaaaaa!
Again, Rosie's voice will stay as Steven because she has lost priveleges of her voice being Shy Girl for cheating off a test.