You can crack codes, uncover hidden clues, reveal secret messages, and be a super sleuth with this deluxe kit! Featuring 3 unique activity books (Secret Decoder, Seek & Find, and Secret Message), 2 magic-reveal sticker sheets, 2 decoder wheels, 2 color-change markers, an invisible-ink marker, and a seek & find lens. Crack the codes and complete the puzzles to solve dozens of mini mysteries! Includes Secret Decoder Game Book, Seek & Find Game Book, Secret Message Activity Pad, and magic-reveal sticker sheets. Use the tools to decode, write, and reveal invisible messages. More than 50 unique activities in all. Crack codes and complete puzzles to solve dozens of mini mysteries. Part of the Melissa & Doug On-the-Go line of travel games and activity books. Show Less