Caillou has a fever. Then he gets itchy spots. Chicken pox! He’s not very comfortable and he has to take special baths to soothe the itching. He knows he’s not supposed to scratch but he just can’t help himself. When he sees Rosie playing in the garden he wants to play with her and can’t wait to get better. But by the time he’s finally well enough to go out and pay, it turns out Rosie has chicken pox too!