There are geocaches hidden everywhere, maybe right near you. Here is a snapshot of Michigan: (every dot is a geocache)
Geocaching is FREE! All you need is a GPS and a free account on geocaching.com. Once you have those things, you can start hunting. If you have any questions about Geocaching, need some tips, or want help with your first cache, feel free to Email me at firstname.lastname@example.org. If you have a group that would like a Geocaching class, let me know.
What is Geocaching video
Neat site for Geocaching and Ham Radio stickers:
Thank you to the the kids from the Brenham Commmunity Center in Texas for the great link suggestion! The site they found has a lot of great information on maps, GPS, and how the real world trucking industry makes use of this information. Check It Out Here!