Answer:
There is a puzzle which can be asked all day with a different correct answer each time. What is the puzzle?
Only two backbones and thousands of ribs.
What is lighter than what it is made of?
What goes around the world and stays in a corner?
This thing runs but cannot walk, sometimes sings but never talks. Lacks arms, has hands; lacks a head but has a face.
I am owned by Old McDonald.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?