Answer:
I help boats park
I can be cracked, made, told, and played. What am I?
If you break me, I'll not stop working. If you can touch me, my work is done. What am I?
What has a head and a tail, but no body or legs?
The more you work the more I'll eat.You keep me full I'll keep you neat.
No matter how little or how much you use me, you change me every month.