Try geocaching—a super outdoorsy activity that involves finding a hidden item (aka hidden treasure, as far as the kids are concerned).
Quickstart Guide to Geocaching Using the App - NY Foodie Family
Five Generals Geocaching
Galloway Township couple sees no end in their geocaching
Looking for adventure in NJ? Try the never-ending scavenger hunt
50 Free Things to Do In New Jersey This Summer - NJ Family
Geocaching in N.J.: How to take part in a tech-enabled treasure
In search of Geocache owner from 2000s or what to do with cache
How to Go Geocaching: 12 Steps (with Pictures) - wikiHow
A trip through history in New Jersey – Official Blog