I recommend the entire collection to approach smoothly (thanks in particular to the illustrations was both simple and detailed, and always reassuring), the stages of life (to the doctor (my son stopped crying in the waiting room the day or I brings the book each appointment (one was enough to stop crying), while clean, night, nursery school (excellent!), the veterinarian has the pool ...), the learning the surrounding world (natural or civilized) with very varied themes (bees, camping, trains, boats, police, robots (I love it), sea ...). The collection also offers a cultural opening, informative without being didactic (Paris, London, New York, the music (not for younger because the thread is less evident), Noel, cinema ...) And, learning from History (cro-magnon, knights, castles, forts, Indian, Versailles ...). At 4 years and a half, my son the request again. I myself learned about some not so distant cultures of France (the Befana in Italy for example - Noel). There is also the great pleasure of watching with his child, at the end of the books, the covers of other works in the collection, with a finger pointing to each of them by the liquidation account one has the i- the not c'i it, I want it c'i, c'i it, c'i it all ... Mom !. And Mom, she said 'OK' !!! Desolated, I have not french accents on my keyboard. Enjoy reading.