Robert grew bigger and bigger and so did his problems. Oh, he loved recess, and he played ball and roller-skated with friends after school and had the best time! And the teacher saw to it that they sang and drew pictures and had lots of fun in class. But always there came the problems. And sometimes he slumped down at his desk and said, "I am not enjoying this! Why are you punishing me with all these problems?" And Robert's teacher, now twinkling as if the secret were even more wonderful, answered, "Oh, Robert, I am not punishing you. It's just that you have moved up a grade and are ready for harder problems. And here comes one now." Robert held onto his desk with both hands and squeezed his eyes shut and listened.