Young Bart Collins lives with his widowed mother Heloise. The major blight on Bart's existence is the hated piano lessons he is forced to endure under the tutelage of the autocratic Dr. Terwilliker. Bart feels that his mother has fallen under Terwilliker's sinister influence, and gripes to visiting plumber August Zabladowski, without much result. While grimly hammering away at his lessons, Bart dozes off and enters a fantastical musical dream.
| Costume & Make-Up | Clay Campbell | Makeup Artist |
| Writing | Dr. Seuss | Story |
| Art | Cary Odell | Art Direction |
| Art | William Kiernan | Set Decoration |
| Directing | Roy Rowland | Director |
| Production | Stanley Kramer | Producer |
| Production | Clem Beauchamp | Production Manager |
| Writing | Dr. Seuss | Screenplay |
| Camera | Emil Oster | Camera Operator |
| Editing | Al Clark | Editor |
| Camera | Franz Planer | Director of Photography |
| Art | Rudolph Sternad | Production Design |
| Costume & Make-Up | Helen Hunt | Hairstylist |
| Writing | Allan Scott | Screenplay |
| Sound | Friedrich Hollaender | Original Music Composer |
| Sound | Morris Stoloff | Music Director |
| Writing | Dr. Seuss | Lyricist |
| Crew | Eugene Loring | Choreographer |
| Sound | Russell Malmgren | Sound Engineer |
| Sound | Friedrich Hollaender | Songs |
