I once believed that Santa was secret organization of millions of old men who dressed in red suits giving presents that were bought by taxpayer's money via the government. This was what I convinced myself of when I was probably about 10.
A childhood belief about father christmas

others believed things like this
- I thought that FDR was an government organization during the Great Depression, not a president.Anon
- I thought bathing suits were called "baby suits".— Katie
- when i was little i thought that jesus delivered presents on christmas not santa .— gaby
- when i was a child,i used to believe that Santa claus drove a car and all the presents were in the boot— narration
- When I was little I used to believe that there was a man sitting inside ATM machines giving you your money.— Kazza
- I was convinced my cat was going to steal my money at night. Anon