Answer:
What is often returned but is never borrowed?
Always wax, yet always wane: I melt, succumbed to the flame. Lighting darkness, with fate unblest, I soon devolve to shapeless mess.
Has feathers but can't fly. Rests on legs but can't walk.
Dies half its life. Lives the rest. Dances without music. Breathes without breath.
Always old, sometimes new. Never sad, sometimes blue. Never empty, sometimes full. Never pushes, always pulls.
I have two eyes in the front and a lot of eyes on my tail
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?