Answer:
What gets sharper the more you use it?
My days are numbered.
I look at you you look at me I raise my right you raise your left.
I wear a green jacket on the outside white jacket as a second layer and red jacket inside. I am pregnant with a lot of babies. (one word)
We are little airy creatures all of different voice and features one of us in glass is set. One of us you'll find in jet. Another you may see in tin. And the fourth a box within. If the fifth you should pursue it can never fly from you.
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.