I bought this book for my 20 month old son who loves airplanes! I feared it was too small and not well! First the cardboard pages are so fragile little and my son was quick to make this book a favorite book ... In fact, this book is very comprehensive, very successful and very varied illustrations. I already know that this book will accompany us for a long time because today he understands the course not all situations but later there will be a second different and more rewarding reading! In short, a great book that I recommend to everyone (price / quality unequaled in my way!). I already bought one on the human body that I find even better and my son also loves (yes, we see poop ...!). And I intend to enlarge its library with others from the same collection. And besides, so, since he discovered these "big books", my son abandons his other books old favorites but simpler ...