Answer:
I am gentle enough to soothe your skin, light enough to fly in the sky, strong enough to crack rocks. What am I?
I eat I live.I breathe I live. I drink I die.
I begin and have no end. Eventually I will be the end of all that has begun.
What is the word that even in plain sight remains hidden?
I have a little pool with two layers of wall around it. One white and soft and the other dark and hard. What am I?
No matter how little or how much you use me, you change me every month.