I used to believe that bits of cloud would hit the car if we drove through a 'Cloudburst'.
I used to believe that my Dad didn't really go to work, but sat in the garage in his car all day.
I used to believe that the world's problems would be solved if everyone prayed for Satan to get converted ('Love your enemies and pray for them that persecute you'.) Like it was a trick question only I had worked out!
There were more, but I've forgotten them. I'll be back!
A childhood belief about cars

others believed things like this
- I used to think that if you had a garage sale that meant you were selling the garage!— ~Curtis~
- I remember back in sunday school that if you stomped on the ground you would hurt satan. Anon
- when i was young i thought god was a cloud, big white fluffy cloud floating around with 2 eyes and a smile. — kerrie
- I used to believe that everytime it rain that Mrs. Cloud was crying b/c Mr. Cloud made her mad.Anon
- When I was little I believed little men and little women worked inside my body to make everything work.— Ashley
- i used to believe that if i didn't work at school, i would have donkey ears, so now i work hard !!!— denis