"You know, these little devils?", says Grandpa
"Billions of them. Everywhere. Here, outside! Very useful"
"but their names get bad rap, you know", he sighed.
"They are mostly pluses and minuses. Well some are stars, squares and polygons too. And,son, they always need help to enter. Without help they cannot do their job"
I knew what he was talking about. Nothing microscopic.
Who are they? Who helps them?