Answer:
What is round as a dishpan, deep as a tub, and still the oceans couldn't fill it up?
There are millions of me. I am very small but when moving fast I am deadly.
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
What is lighter than what it is made of?
You can spin, wheel and twist. But this thing can turn without moving.
Before I grow I'm small. When I'm old I grow tall. When I die I give a mighty fall.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?