One of the reviews in Japanese questions the usage of made-up cars (i.e. egg-car, zipper-mobile), and thinks that perhaps the book is less than adequate because of it. I disagree wholeheartedly. The amusement with with children see the tiny lemon car, or the hot dog car (and I rush to point out that there ARE a few hot dog cars in the USA) compels them to read more and to use their imaginations. How creative it is to see a car made from a yogurt pot! Even my 3 1/2 year old loves to see the different cars, although for her, a single reading per day suffices. We are buying a second book because our first has been so well loved in just 6 weeks.