Add some mystery to your days with this super-cool, portable Secret Decoder: The Case of the Slippery Flippers mystery and activity book! In The Case of the Slippery Flippers, junior detectives will help Gary Gumshoe follow the clues to solve an important case, while doing a variety of activities along the way. Use the handy Seek & Find Lens to spy hidden clues, and the Spy Pen to magically reveal more hints. The detective tools conveniently store in the book's cover! The 18 pages of activities include mazes, seek-and-find pictures, puzzles, word scrambles, and more. A perfect take-along activity book – this On-the-Go Secret Decoder book helps teach cognitive development and problem solving, and encourages independent play.