What is a flat traveler?

A flat traveler is anything you can laminate and stick in an envelope to send to another family. They usually make a journal or fill out a paper you send with your traveler about their state. Again you can send back pretty much anything you want about your state and pictures of the traveler with your family doing just about anything you do. My kids love their traveler dolls as they call them. They are sad to see them leave and thrilled when they come home!