Geocaching

My son James got started in geocaching last week.  He asked me to join him and it is really fun. There are objects hidden all over the world in various size waterproof containers.  Some are as small as a peanut (nano size).  Inside their is a paper log where you can put your name and date.  You can find their locations from an Ipad app or Android app which gets you to within a 30 feet or so radius.  It sounds easy but it can be challenging.  We have found 10 items so far.  We started on May 8th, 2015 and have been out every day.  We also have found at least 1 item each day.