The animated debut of Woodstock and Franklin.
The clown who takes Peppermint Patty and Charlie Brown's tickets at the Barrel O' Fun is a rare instance in the Peanuts franchise of an adult's face being visible.
The first "Peanuts" production without a musical score by Vince Guaraldi, who composed for all previous specials and the first and previous movie, Un niño llamado Carlitos (1969). This was deliberate, as it was an experiment by Charles M. Schulz, who specifically wanted a more commercial, Disney-like feel for this film.
The first of the theatrical Peanuts films with Peppermint Patty as a major character. She previously made a very brief cameo in one shot of Un niño llamado Carlitos (1969).
The plot of the film is an expansion of a storyline previously featured in the Peanuts comics strips.