Caillou's at Grandma's and he's in a bad mood. He doesn't feel there's anything to do. Caillou insists anyway that he's not grumpy and not hungry either and doesn't want apple pie. Caillou decides to fingerpaint using Grandma's paints. Then, Grandma convinces him to have some pie, but only after getting cleaned up. Then his Mom comes to pick him up. Grandma tells him he can come back if he's ever grumpy again.