The first (and last) time I flew a kite as a child, I was told that under no circumstances could I let go of the string.
One tug on that kite, and I was instantly terrified that a good gust of wind would come along, the kite would pull me right off the ground, and I'd be stuck in midair until I smashed into a tree, or until I lost my grip and plummeted to earth. I was in my 30s before I was willing to try it again.
A childhood belief about toys

others believed things like this
- I used to believe planes flew by being attached by strings like a kite.Anon
- If you pull a funny face, the wind will blow and it will get stuck.Anon
- Turtles can fly. I believed it for ages.
My turtle got lost or probably died and I was told it flew away.Anon - I used to think that the tree branches moving was making the wind, not the wind making the tree branches move.— Jenny
- I used to believe that the wind was from the earth turning.Anon
- if you cross your eyes and there's a gush of wind, you'll get stuck like that !!— Olivier