Answer:
I am nothing but holes tied to holes, yet am strong as iron.
Two horses, swiftest traveling, harnessed in a pair, and grazing ever in places. Distant from them.
I am a fire's best friend. When fat, my body fills with wind. When pushed to thin, through my nose I blow. Then you can watch the embers glow.
A box without hinges, lock or key, yet golden treasure lies within.
I'm tall in the morning and short in the noon. I disappear at night but I will be back soon.
What covers its face with its hands, speaks no language, yet most known what it's saying?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?