Answer:
The more you take the more you leave behind. What am I?
What is it that after you take away the whole some still remains?
I am an instrument capable of making numerous sound but cannot be touched or seen.
I am the tool for inspiring many. Buy me in the store for not much more than a penny. Don't overuse me, or my usefulness will go. What am I?
I am heavy forward but backward I'm not.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.