The Secret Invisible Ink Activity Book

Inside this sensational activity book, little sleuths will find everything they need to graduate secret-training camp! Including creating a unique code name, writing coded messages, solving crimes through clues, finding hidden treasure and so much more. Best of all, secret elements are revealed throughout the book with the sensational UV-light pen, and little secret agents can store their own secret messages with the special UV pen ink (revealing them when they want to with the torch end).