Over the holiday, hubby was given a GPS device from his mom, with the thought that he would enjoy using it for a hobby called "geocaching". In geocaching (gc), you go to the gc website and look up coordinates for "treasures" that are buried in your area. You enter then into the GPS unit and then you are off to find the cache. Once there, you log your visit into the log book, take a small prize and leave one behind. Sometimes there is a "travel bug" that has a certain destination in mind, that you might want to help move along.
While we were on the East coast we picked up one that wanted to travel along Route 6. We helped it go 1500 miles by taking it back to Texas with us and leaving it in a cache on Route 6 here. We logged it on the gc website so its owner could follow its adventures. It is a cheap hobby once you have your GPS unit, and it gives one the chance to see parts of the local neighborhood which you likely would never visit on your own plus enjoy the outdoors at the same time.
Since we've been back, we've gone every weekend. It is a very reasonable family fun event where anyone of us is likly to find the cache. Our 7 year old has had as much success as we have. Sometimes it helps to be on his eye-level, especially when the cache is hidden in the hollow of a dead tree. It is comical at times to watch us wading through overgrowth; we are not as stealthy as we should be, but we are enjoying ourselves.