Answer:
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.
What has a head and a tail, but no body or legs?
I have two bodies joined together as one. When standing still, I run and run. What am I?
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
I am taken from a mine and shut in a wooden case from which I am never released. Yet I am used by almost everybody. What am I?
Which bank is not used for storing money?