Answer:
An iron horse with a flaxen tail. The faster the horse runs, the shorter his tail becomes.
Autumn leaves and bad bowlers wreak havoc on this
A house full, a yard full, a chimney full, no one can get a spoonful.
I never was, am always to be. No one ever saw me, nor ever will. And yet I am the confidence of all, To live and breath on this terrestrial ball.
Kills the bad ones and the sad ones. Tightens to fit, so one size fits.
Break me and I am better immediately set and harder to be broken again.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?