Letterboxing

Letterboxing Kids - Includes a map-reading game, photo album, story and instructions for making rubber stamps.
http://www.letterboxing.org/kids/

Letterboxing Info Sheet - An explanation of the hobby for printing out and including in your own letterboxes.
http://members.aol.com/Letterboxr/infosheet.html

Have Feet Will Travel - An introduction and guidelines to finding letterboxes on Dartmoor. Includes details of National Park by-laws and contact details for checking military activity.
http://easyweb.easynet.co.uk/~have.feet/boxing/boxing.html

About Letterboxing - Learn about getting started in this hobby and its history. Includes FAQs, message boards and search clues.
http://www.atlasquest.com/aboutlb/

Letterboxing North America - Includes a FAQ, links, glossary, and clues for letterboxes all over the United States.
http://www.letterboxing.org/

Silent Doug's Letterboxing Site - Articles including getting started, outdoor ethics, a glossary, and an explanation of cryptic letterboxer codes. Also includes a list of boxes found and clues for boxes placed. Most clues are for boxes in the northeastern region of the United States.
http://www.letterboxing.info

Dutch Letterbox Site - Provides information on getting started, codes of conduct, prehistoric Dartmoor and the 100 club.
http://home.wanadoo.nl/letterboxing/engels.htm