Answer:
What you do to determine the length of something
Godzilla calls this place home.
Longer than a decade and shorter than a milennium
You row in one while you float.
There is one in every corner and two in every room.
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?