Answer:
With sharp edged wit and pointed poise. It can settle disputes without making a noise.
A time when they're green. A time when they're brown. But both of these times, cause me to frown. But just in between, for a very short while. They're perfect and yellow. And cause me to smile.
The more of them you take, the more you leave behind. What are they?
What do you throw out to use and take in when you're done?
By the way, what never moves, wears shoes, sandals and boots, but has no feet?
You use it between your head and your toes, the more it works the thinner it grows.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?