Simple and good app, especially for ESL students.
This is quite impressive for a free app with NO ads!!! I use this app to teach Japanese elementary school children the English language. Because we have multiple iPads, it is important that the apps we use are simple and self explanatory for foreign students to use by themselves. And this app delivers! Is it perfect? No! Some things to improve: - the animation of the third room (with the trains) is painfully slow! Developers, speed up the trains! Make it exciting. - add the support for making your own sentences, saving, exporting and importing through the cloud services. I would pay for that good money! But as a free(!) app, it deserves 5 stars!