Answer:
I wiggle and cannot see; sometimes underground and sometimes on a tree. I really don't want to be on a hook and I become a person when combined with “book”.
What type of shoes do spies wear?
I am useless when together but useful when I am broken apart. What am I?
I always have to work with something in my eye. What am I?
I only exist when you are here. Where you never were I can never be.
It rows quickly with four oars but never comes out from under his own roof. What is it?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic