Yes & Know Invisible Ink Trivia Game Book: Classic Games
Details
The original invisible ink activity books are back, and better than ever! 36-page book contains classic Yes & Know games, plus fun new puzzles and quizzes to solve. 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, rainy days and more.