When you go to the store, you know how to check to see if fruits and vegetables are ripe. Well, my brother (I know, it's not about me) used to believe that an egg, if left on a shelf long enough, could eventually hatch into a chicken. It was not until much later in his life, actually, that he discovered that store-bought eggs could not hatch because they were un-fertilized. All that time, he was afraid he might actually see a beak when cracking an egg open.
A childhood belief about general

others believed things like this
- I used to believe that you could keep a chicken egg (that you bought) warm, and it would hatch!Anon
- I used to believe that all animals hatch from eggs— Bryan Flores
- I used to believe that I could make a chick hatch from egg carton as long as I kept it warm :)— Stephanie
- I used to believe that only brown eggs came from chickens. I thought white eggs were made at the store— Destiny
- If you eat your fruits and vegetables you will grow much faster and your muscles will be very happy!— Bruno
- My mom had me believing that, like fruits and vegetables, the crusts of bread were the healthiest part.— StephTheGeek