All aboard for a brand-new Little Engine adventure! Little Engine agreed to deliver the mail when the Postman went off on vacation, and readers 4 to 7 can come along for the ride. With delightful rhymes and cheerfully retro illustrations very much in the style of Watty Piper's original tale, this set also includes 6 folded letters and envelopes inside, plus stamps from around the world, recipes, and puzzles.