Answer:
What can be swallowed, but can swallow you?
I am mother and father, but never birth or nurse. I'm rarely still, but I never wander.
Useful tool for who in darkness dwell. Within you, corrupting like a deadly spell.
They can float and tickle, but their sound is rarely heard unless you're a pillow or bird. What are they?
What is lighter than what it is made of?
What never gets any wetter no matter how hard it rains?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?