Caillou spends his summer doing many new things. While the family is on vacation, they go to the beach and camping in the woods. The cold water takes some getting used to but once he's in, it's alot ...

Caillou learns his address when a letter mailed to him is delivered to his next-door neighbor Sarah by mistake. Caillou also learns how to ice skate (though it takes some perseverance---two lessons).