You can start your own geocache with the following geocaching supplies. First, you need a container which can stand up to the weather and preferably animals and fire. If the potential site is rural, you can use a plastic container about the size of a lunch box or perhaps a military surplus ammo can. If you're placing a geocache in an urban area you might need to use a smaller, more easily-hidden, container.
Okay, so you have your geocache container.
The geocaching supplies which go into the container include a logbook, complete with pen or pencil, maybe a stamp and any other trade items you'd like to circulate. These trade items, which are some of the most intriguing geocaching supplies in this burgeoning sport, can vary from CD's to books, from buttons to coins and from games to small toys. The very first geocache, buried on May 3, 2000, contained videos, books, software, money, food, and even a slingshot. Some cache treasures, dubbed "hitchhikers," are intended to travel from cache to cache, and include Geocoins and Travel Bugs. These items have the capacity to have their travels logged and tracked online. "Hitchhikers" often come with a goal, whether that is to go as far as possible from home, to arrive at a certain country or to simply race other "hitchhikers" via speed or distance.
Global Positioning System
Your list of geocaching supplies is not complete without a GPS (Global Positioning System) handheld receiver. Once you've sealed up your container, you hide it, and then record its location using GPS coordinates. You can then post its location and coordinates on a geocaching listing site. You in turn can search for other geocaches by finding coordinates on a listing site. When you've discovered a geocache, you can record your find in the logbook, as well as online. Feel free to exchange trade objects; just be sure to leave the logbook, writing utensil and stamp.
Feeling adventurous? Game on!