The Original Yes & Know® Invisible Ink Trivia Game Books are perfect for on-the-go play - each book contains 24 pages of Operation-inspired interactive games, puzzles, trivia and so much more, all in full color! Each book includes a special mess-free Surprize Ink!™ magic reveal pen that snaps into the cover for easy storage - perfect for travel or hours of screen-free quiet-time play anywhere. Portable and interactive fun, the classic Yes & Know books have been updated for today's on-the-go kids and families - everyone will want to have fun with Operation gameplay in a whole new way! • Hasbro Operation– A playful nod to the beloved Yes & Know games you remember, plus new favorites.

Ages 7+

Perfect For: • Road trips • Travel activities • Screen-free play • Educational gifts • Stocking stuffers • Birthday gifts • Family vacations • Restaurant activities • Classroom rewards • Homeschool activities • Waiting room entertainment • Kids trivia lovers • Puzzle fans • Highlights for kids • Jokes • Riddles • Puzzles • Word Games • Mess free • Learning • Nostalgia • Classic Games • Portable.