I used to believe the 'autographs' of famous athletes on baseball bats and basketballs were real. I thought they must be very valuable and so you shouldn't use them.
A childhood belief about sport

others believed things like this
- I used to believe that the numbers athletes wore on their uniforms were their ages.— Sara
- that using athletes foot cream would instantly make me an athlete. — Kate
- when i was small i thought rats mutated into batsAnon
- i used to believe that black wood ear
came from the skin of the bats— JULIE - I used to believe that moths were a species of bats that only ate the tag on the inside of your shirt— Bob the Baby
- I thought for some reason that chewing tobacco was REQUIRED for Major League Baseball players.— Jeff