15-year-old Penelope (Penny) Wood has two great interests - Chuck Harris and the hope that some day she might become a famous,great writer. Chuck also has two interests - his home-made glider and the hope that some day he will go to Tech college. His indifference to Penny is her chief source of annoyance. Mervyn Roberts, Penny's uncle who is only five years older than she is, arrives home with a guest, Roger Van Vleck, and Penny falls for Roger's sophistication. Chuck, resentful, continues to work on his glider over his father's objections. His father wants it destroyed but Elmer Tuttle, their hired man, hides it.
| Actor | Role |
|---|---|
 Jane WithersPenelope 'Penny' Wood | Penelope 'Penny' Wood |
 Jackie CooperChuck Harris | Chuck Harris |
 Edith FellowsMilly Lou | Milly Lou |
 Josephine HutchinsonMrs. Wood | Mrs. Wood |
 William TracyMervyn Roberts | Mervyn Roberts |
 Martha O'DriscollJulie Harris | Julie Harris |
 Edgar BuchananElmer Tuttle | Elmer Tuttle |
 Kenneth HowellRoger Van Vleck | Roger Van Vleck |
 Una O'ConnorEffie | Effie |
 Jonathan HaleMr. Harris | Mr. Harris |
 Addison RichardsDr. Tom Wood | Dr. Tom Wood |
| DDouglas FahyStudent | Student |
 Mary Ann JacksonStudent | Student |
 Edward KeaneMr. Wharton | Mr. Wharton |
| CCharles LindRalph | Ralph |
 Dorothy MorrisShirley | Shirley |
 Lee PhelpsState Trooper | State Trooper |
 Virginia SaleMiss Blackmere | Miss Blackmere |