Bury deep, 
Pile on stones,
My mind will always
Dig up them bones

Many many keys I have, but no door I unlock.
Four strong legs and enchanting voice,
Yet I never run or talk.
What am I?

We are five little things of a similar sort.
You will find us all on a tennis court.
What are we called?

So far as I can determine,
only one other word can be made from the letters of INSATIABLE.
Find it.

All about, but cannot be seen,
Can be captured, cannot be held,
No throat, but can be heard.
What is it?

Nothing inside, nothing outside, at least that you can see.
I’m as light as a feather, yet ten men can’t lift me!
What am I?

For all times it’s unchanging,
it divides without traces;
it’s powers are limited to itself and it’s bases.
What am I?

As a whole, I am both safe and secure.
Behead me, and I become a place of meeting.
Behead me again, and I am the partner of ready.
Restore me, and I become the domain of beasts.
What am I?

What is black when you buy it,
red when you use it,
and gray when you throw it away?