Letterboxing for Kids and Teens

• Recreation: Outdoors: Geocaching 

• About Letterboxing  - Includes a guide to letterboxes in US states, plus information on how to get started, with FAQ.
• Letterboxing  - Details the hobby and its history, instructions of activities, tips, and guidelines. Features articles, and contact data for queries, comments, and suggestions.
• National Geographic Kids: Letterboxing  - Article outlines the fun of letterboxing, with hints and tips.