I've visited your suggested website for Geocaching, David. Here is an exceprt: ------------------------------------------------------------ What is Geocaching? Geocaching is an entertaining adventure game for gps users. Participating in a cache hunt is a good way to take advantage of the wonderful features and capability of a gps unit. The basic idea is to have individuals and organizations set up caches all over the world and share the locations of these caches on the internet. GPS users can then use the location coordinates to find the caches. ------------------------------------------------------------ OK, this is already way over my head. I can barely handle the GPS system on my car. I have named her Cyndi and in the privacy of my own vehicle I will admit to verbally abusing her: "Listen, Bitch, the next time you say, 'U turn if possible,' I rip you out of the dashboard and spread your wirey guts all over the highway." I don't mean to sound sexist, but my nephew will need a guy or a woman who works at the Cal Tech Seismology Lab to take him Geocaching.