One of the better scavenger hunt games for everyone are museum hunts. They really do not consist of finding physical items but better yet to search for clues that "hidden" in paintings, sculptures, etc. These types games become educational to children and adults a like. As a matter of fact once adults play these types of games they walk away saying "I learned something today by playing this" there are a few companies that offer these types of games and are great for a family outing, birthday, adult gatherings, or something to doetc. Give them a shot i am sure you will love it!