Answer:
I start new then become old. Start clean but be one dirty. I usually start big then become little.
Two bodies have I, though both joined in one. The more I stand still the faster I run. What am I?
What is at the end of a rainbow?
Tear off my skin. I won't cry, but you will. What am I?
small land in water.
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