ablo goes to his exercise class at a nearby health club twice a week. He enjoys the classes very much. He likes to stretch his legs, bend his arms and knees, and roll on the floor. When the class finishes. Pablo's mother, Lena, takes him home for a nap. Why? Because Pablo is only six months old! In the U.S. today, 30% all children re overweight. This can be very unhealthy and dangerous, too. Many parents want to prevent this. Therefore some parents bring their young children to exercise classes to help their children stay healthy. In fact, some infants who e only a few weeks old can attend these classes, too! These parents want their children to enjoy exercise. They hope that their children will grow up to become adults who enjoy exercise, too.