When Sid decides to sit and watch TV all weekend long, he learns an unhappy fact: that not exercising makes your body feel terrible! When Sid decides that he is only going to eat birthday cake at every meal, he soon regrets his decision. Sid also learns about different kinds of teeth and why brushing them is important, and he discovers why washing his hands is important even when he can't see the germs! Sid and his friends learn new habits and fun ways to stay healthy. Bonus vaccination special.