Answer:
What has a neck and no head, two arms but no hands?
Sitting down you have it, Standing up you don't.
What has roots that nobody sees, and is taller than trees. Up, up it goes, and yet it never grows.
This is the main ingredient in spaghetti and Mac-ยญN-ยญCheese.
There is one in every corner and two in every room.
It is something you will never see again.