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.
They can float and tickle, but their sound is rarely heard unless you're a pillow or bird. What are they?
I weaken all men for hours each day. I show you strange visions while you are away. I take you by night, by day take you back. None suffer to have me, but do from my lack.
What is made of wood but can't be sawed?
They made me a mouth, but didn't give me breath. Water gives me life, but the sun brings me death.
A doctor might remove one from the neck of a Dracula victim.