This could be fairly popular and there are few resources for our area that supply geocache numbers. There are now 2 that I know of in the name of PFF. I like to take my kids, its family friendly and gets the family out of the house for some excercise, a little educational and good family time. Introduce the younguns to the world of GPS, take them for a walk maybe somewhere that they have not been, or somewhere you go regularly. Get them to look forward to an hour or so of hiking and then check back in a month or so to see how many people have joined the hunt. Most of all have some fun.