Geocaching

Four years ago we cleaned up a geocache that was tucked under a bridge in our backyard. Since then, almost 40 kids or families have visited and signed a slip of paper. It's a great use of technology they catch you outside and enjoying nature a little.I was delighted to find that some of the visitors had left behind trinkets or traded trinkets that they found inside the box. 

https://www.geocaching.com/