I was introduced to The Jolly Postman by Janet and Allen Ahlberg years ago. It is truly a treasure—it’s an interactive book about the funny letters that a postman delivers to the denizens of a fairy tale world and it includes actual pieces of mail stored in envelopes throughout the book (like a rueful apology note from Goldilocks to the Three Bears). This unique book pairs well with the Stamp and Sort Mailbox for an afternoon of sorting mail, writing letters and laughing over the silly correspondence in The Jolly Postman.