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 can run but not walk. Wherever I go, thought follows close behind.
A building where people and stories are on stage
We are five little objects of an everyday sort. You will find us all in a tennis court.
You use it between your head and your toes, the more it works the thinner it grows.