Once upon a time, in a cheerful little town, there lived a bird named Billy. Billy loved to fly high in the sky. Every day, he would fly and play with his friends.
One day, Billy's mom told him that he needed to do some exercise. She said, "Billy, you must fly and exercise to grow big and strong." So, Billy decided to fly even higher and faster than before.
Billy flew around the town, feeling very happy. He saw his friends and they all flew together. They had lots of fun doing their exercise. And from that day on, Billy always remembered to fly and exercise, so he could grow up to be a big, strong bird.
