Answer:
There is a puzzle which can be asked all day with a different correct answer each time. What is the puzzle?
What can you put in a barrel to make it lighter?
I am mother and father, but never birth or nurse. I'm rarely still, but I never wander.
Hoofed frolicking.
Two little holes in the side of a hill. Just as you come to the cherry-red mill.
People take me on walks and I run and have fun. What am I?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?