When a young girl meets an elderly Russian immigrant who wants, at last, to celebrate his bar mitzvah, she comes to learn that true friendship knows no age. Sarah often listens when her father tutors students for the Bar or Bat Mitzvah. She enjoys hearing the boys and girl learn Hebrew and sing. When a new student arrives, a wrinkled man named Mr. Katz, Sarah is confused. He is older than 13. Much older. How can he have a Bar Mitzvah?...