Here is the handout I have been using. Feel free to copy it and use it :-)
Geocaching is a new Sport/Hobby that lets people with GPS hand-held receivers hunt for Treasure. Not buried treasure, but instead ... hidden treasure. You use your GPS by entering the coordinates listed on Internet sites into your unit and then go to the location, using your GPS to guide you where you hunt for the booty... called the Geocache. The Geocache is a container that has prizes inside. The prizes offered vary from ũ - ŭ in value. The prize is your reward for finding cache. Along with the prize you will usually find a logbook that you can use to document your Find and see who else has also discovered the cache. You may take one of the gifts, but are required to replace the gift you take with one you brought along with you. It's a one - for - one exchange. A good place to find gifts is a "dollar store". The owner of the cache will usually stop by the hiding spot periodically to read the logbook,add new items, or even to add clues to other Geocaches. If you are looking for a fun and exciting way to use your new GPS Geocaching might be the way to do something new and interesting.
Web Sites to help you get started may be found at : http://www.brillig.com/geocaching
Don't have a computer to log onto the Internet -- You can usually go to the Public Library or a school and use their computer to visit these web sites.
Note: Some caches contain a disposable camera. The camera should not be taken as a prize. The camera is there so you may document your find by taking a picture of yourself or your group. The cache owner will stop by from time to time and when the camera is full, will take the camera in and have the film developed. You might request a copy of your picture from the cache owner or the owner might just post your picture on a web page along with the other visitors.
Recommended Cache Items: Small toys,paperback books,small stuffed animals,music cd's,hitch-hiker items (hitch-hikers are meant to be taken to another cache and left there). All items should be placed in plastic bags or remain in the original packaging.
NO-NO's for the cache: Do not place hazardous items in the cache. Disposable lighters,aerosol cans,matches, or other flammables are no-no's.Food,candy,and beverages will most likely be found by animals long before a human finds them, so they are no-no's as well.
Finally: Please take a trash bag with you on your hunts and gather trash along the way. Be sure to send a photo of you and your trash collection to one of the web sites listed above. They are trying to show the Parks Departments, BLM, and the Forest Service that Geocacher's are responsible people, that really care about the environment. Pictures are worth a thousand words.