Geocaching is the perfect mix of technology and nature.
If your buddy enjoys geocaching and you need to give him a gift, how about something as personalized as one of the geocaching tee shirts that will allow him to promote one of his favorite activities?
You can choose from designs as simple as a geocaching logo, or from phrases meant to make readers laugh, like the "billion-dollar" quote above.
If you have older children and a hand-held GPS device, try your hand at Geocaching.
To take part in the cache hunt, visit the geocaching site to find the coordinates to a cache in your area.