We are a proud family of nerds, and love puzzles. A set of mystery puzzles appears in our mailbox once a month -- for less than it costs to take the family out to the movies! Our first box was DC, and we live in DC! Our third was Athens, and our daughter is especially into mythology. We just got Mexico City, and haven't had time yet to dive in... but there are fun things in that packet! I highly recommend this subscription.