S5·E66 Am I Big Yet?

Rosie has had a growth spurt and Caillou wants one too. He tries desperately to grow bigger by eating lots, and exercising, and even trying to sleep during the day. But nothing works! When Caillou sees that his friend Andre doesnt always like being big because he cant do some of the fun things he did when he was little Caillou decides its okay to be little... at least for a little while longer.