Answer:
The more you look at it, The less you see.
Take it and you will lose or gain more than all the others.
You can tumble in it, Roll in it, Burn it, Animals eat it, Used to cover floors, Still used beyond stall doors. Freshens whatever it is placed on, Absorbs whatever is poured into it. What is it?
What age most travelers have?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.
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?