You have seen the original Mental Flexibility Test, this book is that test on steroids. 16 = O. in a P. Answer 16 Ounces in a Pound. 7 New tests plus all new Clue Flex, Crazy Clue Flex, Crazy Flex, Word Flex, & Theme Tests. Also included, The Educational Packet just so you can prove you did not sleep all through school. Lots of Mental Frustration Fun awaits. The Educational Tests are also a great tool in assisting one in learning specific topics that include numbers and words. A few of the topics covered are American Presidents, States Entering the Union, Bones of the Body, Metric System, The Periodic Table and many more. P.S. Enjoy the peaceful setting of the cover. It will be the last bit of rest your mind gets for weeks once you open it.