Only the very advanced nine and ten year old could comprehend the technical aspects of this book, but the eleven and twelve year old air-minded boys will find this ideal informational material in a free, easy and personalized style. (Early teens may think it looks young -- but the text is not written down.) Many aviation questions are answered: -- do you want to know what makes an airplane fly? How to fly one? What makes air travel safe? How many different types of planes there are? What various aviation workers do? Advice on going into field of aviation? The answers are clear and concise, written by men who know and love the air field. An aviation ""must"" for the home bookshelf, school or library. Definitely ""on the beam"". Teachers will find of special value the chapter Worthwhile Things To Do. Excellent for social studies.