Answer:
As soft as silk, as white as milk, as bitter as gall, a thick green wall, and a green coat covers me all.
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?
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.
Be sure to shout for its answers are weak, but there is no language it cannot speak.
What gets beaten, and whipped, but never cries?
What did the piece of wood say when he saw the screwdriver and screws approaching?