Answer:
Has feathers but can't fly. Rests on legs but can't walk.
Thousands lay up gold within this house, But no man made it. Spears past counting guard this house, But no man wards it.
As soft as silk, as white as milk, as bitter as gall, a thick green wall, and a green coat covers me all.
This is needed both for courage and hardcover books.
You saw me where I never was and where I could not be. And yet within that very place, my face you often see.
What goes up the hill and down the hill, And spite of all, yet stand still?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?