When I was little I believed that trees were already completely formed under the ground.They pushed themselves out of the ground and when only the tops were showing it became a bush or hedge.
A childhood belief about plants

others believed things like this
- I thought ground beef was the meat they scraped off the ground at the slaughterhouse. Yuck.Anon
- When I was little, I used to believe that the tops of trees touched the sky.Anon
- I used to believe that it wasn't wind that made the tops of trees move.. It was dinosaurs.— H
- I believed that wind was caused because the trees moved. I was completely sure my conclusion was correct.— Glenr
- I used to believe that if you dig a hole in the ground and put pepper in the hole, the ground would sneeze.— Cookie
- My cousin once told me that glass was made from ground up beetles, and I believed her! — benjymous