This app is great. Not sure about those other negative reviews. The interface is easy to use. The conversations that have occurred as my two and four year old kids explore the globe have been meaningful. They love the exploratory nature of the app, and switching from audio information, to the actual photograph, back to the animated atlas view. As an educator myself, Im pleased and impressed with how this atlas hooks the learner and provides differentiated content to address multiple intelligences. Explore for twenty minutes a week with your child and youll be amazed at what theyll retain about this wonderful world of ours. We recently invested in two expansion packs - North America and World Art. Both are good as these were two areas that my kids wanted more info on, but I hold back a star only because I would like to be able to synch the expansion packs with the standard atlas so all the info could be accessed from the same source. I recognize that this would make the globe extremely cluttered - all those state and provincial flags on their own add a lot - and might make the interface more cumbersome, but it might be cool too!