Once upon a time, there was a boy named Billy. Billy was a very picky eater; he complained about every meal his mother made, saying, "I don't want this, I don't want that." Because of this, he was very weak and thin. His mother was exasperated; she didn't know what to cook that Billy would like.
Billy's friend, Jimmy, came to play with him every afternoon. Billy would ask his mother for permission, and then he and Jimmy would play soccer in the street. Billy would get tired quickly during the games and always lost, while Jimmy always won because he shot the ball powerfully, and Billy couldn't control Jimmy's shots. Sometimes he would even fall down.
Finally, one day when Billy was losing to Jimmy again, he asked, "Why don't you get tired, and how do you have such strong shots?" Jimmy replied, “Because I eat well and I exercise.”
Billy remembered what his mother had told him: if you don't eat, you won't get strong. So, he decided to eat whatever his mother cooked from then on. He told Jimmy not to come to play for a month. Jimmy was very surprised but agreed.
For an entire month, Billy ate all the meals his mother made without complaining. After a month, he happily went to find Jimmy, looking much stronger. They began to play, and Billy kicked the ball powerfully. Jimmy could no longer handle Billy's shots and lost the game. Billy became the winner.
From that day onward, he always listened to his mother's advice and ate his food.