how to be a perfect person in just three days is a 1983 film produced by wonderworks, based on the children's book "be a perfect person in just three days!" by stephen manes. a family-friendly comedy starring wallace shawn, ilan mitchell-smith, and hermione gingold, it is about a twelve-year-old boy named milo, a hopeless klutz who happens upon a mysterious advertisement in the paper for becoming a perfect person. a three-day course devised by a peculiar man, dr. silverfish, milo enrolls and manages to complete the strange tasks. only after completing the course does milo realize perfection is not all it's cracked up to be.