Answer:
A nut cracker up in a tree.
What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?
I'm not really more than holes tied to more holes. I'm strong as good steel, though not as stiff as a pole.
It happens when something has been cut with H2O.
What I am filled, I can point the way. When I am empty. Nothing moves me. I have two skins. One without and one within.
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.