Add some mystery to travel days and amp up the thrill in your activity-book library with this cool spy set! The deluxe kit includes three activity books, each with a different spy technology: Use the decoder ring to find secret messages, reveal hidden clues with the spy glass, and solve all sorts of mysteries with the help of a trusty secret-message pen. Packaged in a take-along pack, the collection lets kids take the fun along on their next mission . . . and makes an ideal gift!