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). And he tries his hand at teaching. His student: his little sister Rosie. It isn't exactly as easy as ABC, but Caillou sticks to it here, too, and before long Rosie is learning the alphabet.