Answer:
What kind of nail can be grown?
It is in every mountain, it's not in any hill, it's not in all the world, and yet it's in the mill.
The thinkers usually hold this body part
What is something yet nothing, but if you fill it up it will disappear?
Break it and it gets better, immediately set and harder to break again.
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?