Answer:
The thinkers usually hold this body part
Sometimes you feel it weigh a ton. Yet it is nothing, but somehow still there. Makes you uncomfortable around anyone, But speak its name and it's gone.
What has many keys but cannot open a single lock or door?
What instrument can you hear but never see?
How many bricks does it take to complete a building made of brick?
Why was the cook arrested?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?