Answer:
I have one eye. See near and far. I hold the moments you treasure and the things that make you weep.
Long and think, red within, with a nail at the end.
Turn us on our backs and open up our stomachs you will be the wisest of men though at start a lummox.
You can tumble in it, roll in it, burn it, animal eat it. Used to cover floors, still used beyond stall doors. Freshens whatever it is placed on. Absorbs whatever is poured into it.
In we go, out we go. All around and in a row. Always, always steady flow. When we'll stop, you'll never known. In we go, out we go.
How do you know if a sniper likes you?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?