Answer:
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 comes once in a minute, twice in a moment, but never in a thousand years?
A serpent swam in a silver urn, A golden bird did in its mouth abide, The serpent drank the water, this in turn, Killed the serpent. Then the gold bird died.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
It is a part of us, and then replaced. It escapes out bodies, to a better place. The world becomes its sizeable home. Its passions unrestraint, the planet it roams.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?