From PBS KIDS - Where is Mars?: Caillou and Daddy are finishing up a model of the solar system for show-and-tell...until the little red ball they're using for Mars disappears. Where did it go? Caillou continually blames Rosie...and he discovers it was Gilbert who ran off with the little planet! Caillou apologizes to his sister, realizing he shouldn't jump to conclusions.
Emma's Extra Snacks: Caillou is confused when Emma is allowed to have extra snacks at preschool. He's even more confused when Miss Martin explains that Emma has Type 1 Diabetes. Worried about his friend, Caillou becomes very protective of Emma, not wanting her to do anything - not even go down the slide! But when Emma outruns Caillou in a race, he soon realizes Emma's diabetes isn't like a cold or flu. It's something Emma has to live with every day...and she's doing a pretty good job of it.
Lost and Found: When things begin to go missing around the house - like Mommy's keys - Mommy blames Gilbert. Caillou is sure Gilbert didn't take them...and he sets out to prove it! Together, Caillou, Mommy and Rosie backtrack through the house and eventually discover Caillou's theory was right - Gilbert didn't take the keys -- Mommy left them in the door handle!