I used to think the 'turn left with care' sign at the corner said 'Turn left with car'. This seemed so obvious that having a sign about it seemed silly. Once I mentioned this fact to my mother in a world weary voice. She found that so funny it became one of her favourite stories to tell other adults.
I guess in the US and Europe that would be turn right...
A childhood belief about road signs

others believed things like this
- I used to believe that you could not make the car turn left or right without turning the blinker on.— Christy Shane
- I used to turn the TV off when I left the room so I didn't miss anything.— S.Lee
- I used to believe that if you left crumbs out for a long period of time, they would turn into ants.— Bylaberrie
- I used to believe that coin change could turn into actual paper money if you left it alone for a long time. — Marcus O
- I used to believe that when the year 2000 came around we would all turn into robots - how silly of me— Andy
- i used to believe if i eat fish it would turn my stomach into a fishtank and make me turn into glass.Anon