My classes have had the best time creating their own "Flat Stanleys" and having them travel literally around the world! After reading the book, "Flat Stanley", have students complete the first letter with their first names. Send home the second letter and attach a regular envelope for parents to address and send back to school. Have students put their letter and their flat person in the envelope and send them off on a world wide adventure!
Both letters are editable so you can include your information instead of mine! :)