Answer:
With a halo of water and a tongue of wood; stone as skin long I stood.
you cannot keep me until you have given me
I am free the first time and the second time, but the third time is going to cost you money. What am I?
David's father has three sons: Snap Crackle and ?
You can always find me in the past. I am created in the present, but the future can not change me. What am I?
No matter how little or how much you use me, you change me every month.