Answer:
What can be swallowed, but can swallow you?
It is a sound of empty, speak and it'll talk back plenty. But all the more you yack, you'll get the same words back.
What can't you see, hear or feel, until its too late. What shadows love, and shopkeepers hate?
What has one eye but cannot see?
What flies around all day but never goes anywhere?
I can only be played on a windy day