Answer:
The thinkers usually hold this body part
I know a word of letters three, add two and less there will be.
Most people need it, some ask for it, some give it, but almost nobody takes it. What is it?
What goes through a door but never goes in and never comes out?
It is a form of plastic money.
What never gets any wetter no matter how hard it rains?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?