Answer:
I always have to work with something in my eye.
I fly yet I have no wings. I cry yet I have no eyes. Darkness follows me. Lower light I never see.
I am a ship that can be made to ride the greatest waves. I am not built by objects but built by minds.
You bind me and I walk. You loosen me and I stop. What am I?
I grow up while growing down
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic