Answer:
In many hallways you would stand, if not with this in hand.
Where humans breathe liquid.
There is one in every corner and two in every room.
What has black spots and a white face, is fat not thin, and helps you to win, but tumbles all over the place?
What starts with an "e" but only has a single letter in it?
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?