Geocaching anyone?

So...for my husband's birthday I gave him a small GPS unit to allow our family the opportunity to go GEOCACHING! I don't think I've been so excited about a gift in a REALLY long time! For those of you who aren't sure of what geocaching is, it is a type of treasure hunt using the GPS unit to locate a "cache" (pronounced "cash") with a logbook and potentially something left by the geocacher who accessed the site before you. You also leave something for the next people who will find the cache. The amazing thing is that there are multiple sites everywhere!!  I am so jazzed about going out for the first time today!!