Answer:
I go into the water black and come out red. What am I?
I am free the first time and the second time, but the third time is going to cost you money. What am I?
I am an odd number that become even when beheaded.
I am the kind of nut that is empty at the center and has no shell.
What has 4 fingers and a thumb but isn't alive?
No matter how little or how much you use me, you change me every month.