(A42 WIP title: "Concert at the Park") Caillou and Rosie go to the park with Grandma. There's a band at the gazebo there and Caillou dances with Rosie. Then, the musicians pack up and leave. Caillou's upset, he wants to hear them play! Back at home, Grandma plays the tune the musicians were playing on the piano. Caillou joins in, playing the "drums" and Rosie helps too. Grandma then assists them in making better instruments so they can join her band. They make maracas and at first Caillou wants to play those, but Grandma convinces him to play the drums. Then Grandma tells them about listening to what the other musicians are playing so that they can play along. They play "Row, Row, Row Your Boat." Mom gets home and they give her a performance. The next day at the park, the musicians haven't come back. So Caillou, Rosie and Grandma give the concert instead. (thetvdb.com)