Answer:
It increases and decreases yet no one see it. It is not a fire and yet it can be quenched.
Where do cows go to dance?
What do elves do after school?
If farts are yellow, what color is your burp?
I make two people out of one
People take me on walks and I run and have fun. What am I?
Funny
Animal
Difficult
Easy
Food
Kids
Logic
What am I?