Rural Novelties

I opened the mailbox today and saw this blue plastic Package Marker.  I read it and turned it over in my hand.  Hmm, this is a first, I thought, certainly a new one on me.  I wonder what this is all about.

I know I've never seen one of these before, have you?  Don't you just love the little guy driving the mailbox and the birds flying around?  Chuckle, chuckle.  I also love, "Please Return to Mail Carrier."

For you former urbanites, what rural novelties can you share that you never encountered until moving to the countryside?