Answer:
Sharp and long, flag of the world. What is it?
Look into my face and I'm everybody. Scratch my back and I'm nobody.
As soft as silk, as white as milk, as bitter as gall, a thick green wall, and a green coat covers me all.
I scribble forms of the finest letter, And repel elements of the harshest weather. I am an arrow-aimer and a dust-breaker.
Has feathers but can't fly. Rests on legs but can't walk.
The warmer I am the fresher I am.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?