Other mistake: The narrator says that the train stopped to let the train filled with Christmas carolers go by, but the train passed after the train had already crossed the tracks, so there was no need to wait. (00:19:30)
Frosty the Snowman (1969)
1 other mistake - chronological order
Directed by: Arthur Rankin Jr., Jules Bass
Starring: Paul Frees, Billy De Wolfe, Jackie Vernon, Jimmy Durante
Continuity mistake: When the kids are playing "follow the leader", they show the same kid (same exact clothing, hair color, and animation) hopping over Frosty twice, back-to-back. (00:09:37)
The Magician: You silly children believe everything you see. When you're grown up, you'll realise that snowmen can't come to life.
Karen: But we.
The Magician: Silly, silly, silly.