Caillou and his family improvise a car trip, without any precise destination. After a game in the car, they stop by a gas station and Caillou sees a big truck. Then, they go on a ferryboat and the captain allows Caillou to ring the siren. Truly, the discoveries and surprises on the road are the adventure's success!
This story also exists in English: Caillou - the road trip.
Told by the publisher