Answer:
I am a red drum which sounds without being touched, and grows silent, when touched. What am I?
Use me to reward good behavior.
I have numbers on my face but can't find 13 any place. What am I?
I'm a kind of cup that doesn't hold water, but makes a lot of noise repeatedly. What am I?
I have fangs and enjoy piecing holes with a single bite.
No matter how little or how much you use me, you change me every month.