One Are You Smarter than a 5th Grader Yes & Know Invisible Ink Quiz Book   Put your brain to the test with the Are You Smarter than a 5th Grader Yes & Know Invisible Ink Quiz Book! ????✏️ Use the special pen (included) to reveal the answers hidden in invisible ink! With hundreds of fun questions, it’s perfect for all ages and great for travel, waiting rooms, or anytime you need some quiet fun. ???????? Choose your challenge:???? US History???? Animals???? Space Get ready to see if you really are smarter than a 5th grader!