Answer:
I work when I play and play when I work. What am I?
I rise and fall no matter what, only at finals rest do I not budge. What am I?
I speak without a mouth and hear without ears. I have no body but I come alive with wind. What am I?
I am a cave full of bones and the house of a worm.
I am a fruit. If you take away the first letter of my name I become a crime. What am I?
No matter how little or how much you use me, you change me every month.