Yes & Know Invisible Ink Trivia Game Book: Mystery
Details
The original invisible ink activity books are back, and better than ever! 36-page book contains puzzles, mazes, codes and more - can you solve all the mysteries? The Yes & Know pen features full-color Surprize Ink technology and "magically" reveals invisible clues and answers as you fill in the pages. Terrific for travel and rainy days, plus anyone who loves to solve riddles and mysteries. For ages 7 and up.