Answer:
You have it even if there is none.
What can go up but never come down?
What grows when it eats, but dies when it drinks?
It's in your hand though you cannot feel it. Only you and time can reveal it.
What demands an answer, but asks no question?
People take me on walks and I run and have fun. What am I?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?