Answer:
It goes up and down the stairs without moving.
What travels from coast to coast without ever moving?
What has a neck and no head, two arms but no hands?
Sometimes imaginary and sometimes real, sometimes they are the closest and dearest person outside the family. Who are they?
They can be long or short; they can be grown or bought; they can be painted or left bare; they can be round or square.
I can only be played on a windy day