Do you want to have a big adventure(探险)with no big dangers? Try letterboxing. It's really (excite).

    Letterboxing began England in 1845. It was like hiking and exploring with a special adventure. Someone (make) a letterbox -- a small box with a little notebook in it. The person hid the letterbox in a park, a forest, a city or other (place). Next, the person would write directions(方向) to the box， put the directions on the internet. Then letter boxers used (they) to look for the letterbox.

    Letterboxing might not be as popular as skydiving or rock climbing, but it's a great activity. It's exciting outdoor adventure. And it's very cool (open) a letterbox and know that no one else found it! There (be) now many different kinds of people can have great fun enjoying these activities. you have never done letterboxing before, you can give it a try.