I had another customer stop by today who mentioned that he liked to hike, and was involved with Boy Scouts. I naturally asked him if he had a GPS, and he said yes. A big grin spread accross my face, and I asked him if he heard of geocaching, he said no. I took him over to my computer, and showed him. He asked me to email him the link, so I did. He said it sounded very interesting, and like something the scouts could do.
I'll follow-up with him, to see what he thinks.