Deliberate mistake: The little red-haired girl boards a bus with other children who are headed to summer camp. As the bus drives away, there is nobody in the driver's seat. This movie maintains Charles Schulz's policy of never showing adults in his comic strips or animated television specials, but a bus driver could at least have been depicted in silhouette.
Trivia: This was the first "Peanuts" film since the death of its creator, Charles M. Schulz, in 2000.
Lucy van Pelt: No dogs.
Lucy van Pelt: Agh! I've got dog germs.
Miss Othmar: Wahh wahh wahh wahh.
Franklin Armstrong: What? The new kid is joining our class.
Schroeder: Wow, she's pretty.
Lucy van Pelt: She's not that pretty.