Answer:
I have legs but walk not, a strong back but work not. Two good arms but reach not. A seat but sit and tarry not.
What has four wings but cannot fly and uses the wind but does not know why?
The stack just might be sent all over. Full of what's new, yet it's nearly obsolete.
I am free for the taking. Through all of your life, though given but once at birth. I am less than nothing in weight, but will fell the strongest of you if held.
I have one, you have one. If you remove the first letter, a bit remains. If you remove the second, bit still remains. If you remove the third, it still remains.
What covers its face with its hands, speaks no language, yet most known what it's saying?