Answer:
What flies forever, rests never?
What is always coming every day, but never arrives until the next?
What has thousands of ribs and two backbones?
What goes up and down but never moves?
What has a ring but no fingers?
Two little holes in the side of a hill. Just as you come to the cherry-red mill.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?