Answer:
I went into the woods and got it. I sat down to seek it. I brought it home with me because I couldn’t find it. What is it?
Blade to blade I always win My foe laid low and even. Yard by yard through thick and thin I'm busiest in season.
In many hall ways you would stand if not with me in hand.
Brown I am and much admired. Many horses have I tried. Tire a horse and worry a man, tell me this riddle if you can. What am I?
What invention lets you look right through a wall?
No matter how little or how much you use me, you change me every month.