I'd almost forgotten about this until I read this site, but I used to believe that the reason for AMBULANCE being written backwards (somebody else already mentioned it) was so Russians could read it.
A childhood belief about foreign languages

others believed things like this
- I used to think my priest was a bit foolish for never having noticed that Dog is God written backwards— anticap
- I used to think Russians had surnames ending with ski because of the skiing they do in Siberia.Anon
- I BELIEVED THE TEACHERS COULD READ MY THOUGHTSAnon
- I used to believe that I would one day have a dog, and I would teach him to speak, read, and even write!— Gretchen
- I used to believe if you read a book in the dark, you would go blind.— Ellen
- i thought grown ups read in a different language!Anon