Yes & No Invisible Ink Books 7+

The special pen reveals the invisibly printed answers. See how much you know with hundreds of interesting questions on dozens of different topics. Have fun competing with the invisible opponent as you play games by yourself. Check out all 6 books in the Yes & Know Invisible Ink book series.

Each 48 page book is filled with Sudoku, trivia, hangman, bingo, lineup, tic tac toe, and more. No flipping to the back for answers. Just make your best guess, colour with the magic ink, then watch as the answer magically appears before your eyes! 

Book Includes: