I used to believe the music from ice cream vans was made by the driver playing a xylophone. It never occurred to me that driving and xylophony aren't really possible at the same time.
A childhood belief about ice cream vans

others believed things like this
- My dad told me that ice cream vans only play music when they have run out of ice cream. Anon
- My parents told me that when the ice cream van was playing music, it means he's run out of ice cream :(Anon
- when i was a kid my mother told me that when the ice cream man was playing his music he was out of ice cream— Lynnzea
- I used to believe that if the ice cream truck was playing music, it had sold out of ice cream.— Deprived of ice cream
- If the ice cream truck is playing music, it means they are out of ice cream.— Virginia
- I used to believe that when the ice cream man was playing his music, he had run out of ice cream— Katie