Visitors to the Science Museum of Minnesota provided feedback on the books, How Small Is Nano? and Is That Robot Real? in order to assess the books and their ability to impart knowledge of nanoscience. The visitors, 63 adults in all, read one of the books to the child or children accompanying them, then answered a series of questions about their experience including their interest in and enjoyment of the book they read, as well as the age appropriateness of the book. The report compares and contrasts the two books throughout.