“When your feet touch the ground, I’ll be in space, my dear Noahnoah.” The boy concentrates on breathing in time with Grandpa. That’s another of their games. “Are we here to learn how to say good-bye, Grandpa?” he eventually asks. The old man scratches his chin, thinks for a long time. “Yes, Noahnoah. I’m afraid we are.” “I think good-byes are hard,” the boy admits.