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Burgess Meredith
Puff the Magic Dragon (voice)

David Mendenhall
Terry (voice)

Joan Gerber
Mother / Teacher (voice)

Bob Holt
Father (voice)

Billy Jayne
Boy (voice)

Diana Dumpis
Girl (voice)

Hal Smith
Professor Katzendorfer / Bust / World (voice)

Robert Ridgely
Mr. Nobody / Guard (voice)

Billy Jayne
(voice)