Answer:
What's a place you have left but didn't enter?
There are millions of me. I am very small but when moving fast I am deadly.
A serpent swam in a silver urn, A golden bird did in its mouth abide, The serpent drank the water, this in turn, Killed the serpent. Then the gold bird died.
Who is he that runs without a leg. And his house on his back?
Only two backbones and thousands of ribs.
What is so fragile that saying its name breaks it?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?