Add some mystery to travel days and test sleuthing skills with this super-cool, portable Secret Decoder mystery and activity book! Use the handy Seek & Find Lens to spy hidden clues, and the Spy Pen to magically reveal more hints; detective tools store conveniently right in the travel-size book cover! All 18 pages of activities include mazes, seek-and-find pictures, puzzles, word scrambles and more. A perfect take-along activity book, the On-the-Go Secret Decoder book helps teach cognitive development and problem solving, and encourages independent play.