Answer:
I've been around for millions of years, but I am no more than a month old. What am I?
I go up when the rain comes down. What am I?
The person who makes me doesn't need me. The person who buys me doesn't use me. The person who uses me doesn't know it. What am I?
The shorter I am, the bigger I am. What am I?
What building has the most stories?
No matter how little or how much you use me, you change me every month.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic