It's laundry day at Calliou's house, so he contributes to his job by bringing his clothes down to the cellar. Doris is washing the clothes and thanks Caillou for his contributions. When Caillou decides to get clothes on, he realized all his clothes are being washed! Boris helps Caillou search for clothes, but there are none to be found. The two play dress up, and Caillou wears an oversized yellow button up shirt, jeans, a brown hat, and a mustache drawn on his face.
- When Doris says "You're getting to be a big boy." to Caillou, she says it like she does in the "Caillou Theme Song".