I often beachcombed as a child for agates with my great-aunt. She would say that some stones I found were not quite ready and should be put back to finish turning into agates. I accepted this version until age 18 when I was publically caught out in a geology classroom.
A childhood belief about classes

others believed things like this
- When I was a child I used to believe that cows gave ready butter.— Bane
- I used to beleive that if you swolled a tablet whole you would get kidney stones— kaye
- I was sure that Led Zeppelin was the lead singer of the Rolling Stones.— dave
- I used to wonder why people didn't use his first name when they spoke of McJagger of the Rolling Stones.— silly me
- that the bears which live in the cracks between paving stones are Russian— jonah fonder
- My sister told me not to touch hail stones because they were radioactive. — Mary K