Answer:
Neither bought nor sold but more valuable than gold. It is built but not by hand. What is it?
You can hold it without using your hands or arms. What is it?
Useful tool for who in darkness dwell. Within you, corrupting like a deadly spell.
The man who made it didn't need it. The man who bought it didn't use it. The man who used it didn't want it.
Bright as diamonds, Loud as thunder, Never still, A thing of wonder.
It rows quickly with four oars but never comes out from under his own roof. What is it?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?