Answer:
What is the thing that stays the same size, but the more it's used the more it decreases?
You eat something you neither plant nor plow. It is the son of water, but if water touches it, it dies.
How far will a blind dog walk into a forest?
Without a bridle, or a saddle, across a thing I ride a-straddle. And those I ride, by help of me, though almost blind, are made to see.
I can travel from there to here by disappearing, and here to there by reappearing.
I am free the first time and second time but the third time is going to cost you money.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?