Intended for use by students, this illustrated Australian classroom unit was designed to encourage young people to develop a lifelong habit of letter writing. The booklet begins with a letter to children from the Australian "Post," and excerpts from two poems about letter writing. A section on how letters can link the world emphasizes the benefits of receiving a personal letter, gives suggestions for choosing people to write to, suggests good topics to include in letters, and discusses different types of letters to write (such as fan letters and letters to pen friends). The next section, on how letters can make things happen, introduces students to the format of business letters and tells them how to write polite, effective letters to praise or complain about products, letters to the editor, and letters to public officials. The section showing that letters can be fun describes creative letter writing, serial letters, talking letters, and writing letters for others. Suggestions for designing stationery, envelopes, and postcards are then presented, followed by interesting facts about letter writing, postal history, and stamps. The final part of the booklet provides do's and don'ts to avoid the dead letter office and gives tips on abbreviations and package wrapping. (SKC)