I bought this and the similar motorcycle book for my 15 month old. I know the back of the book says "Choking Hazard, not for kids under 3 years old" but my son is always supervised when he plays with these books, so if it breaks and small parts end up loose, we'll catch them before he can choke on them.This and the motorcycle book completely absorb my son's attention. He rolls them around on their wheels, lays down on his belly to "read" and study them, and makes revving engine noises when he plays with them. We took the motorcycle book with us to a doctors appointment where we had to wait over an hour to see the doctor and it kept him occupied for much of the time. He's more interested in the motorcycle book than the dump truck book, I think mainly because he sees more motorcycles (his dad has a few) and one of his first words was "bike" so he gets excited about being able to say the word for what he is looking at.My husband, who works in the motorcycle industry and is mad about motorcycles himself says that a lot of thought went into the motorcycle book -- the motorcycles pictured in it are a great representative collection of bikes. That's high praise from him!!We love these books and recommend them.