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 kind of pet always stays on the floor?
What can be heard and caught but never seen?
If I have it, I don't share it. If I share it, I don't have it. What is it?
When they are caught, they are thrown away. When they escape, you itch all day.
you hold my tail while I fish for you
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?