Write an Android application and games for existing kids website

I need an android application based on online games website. The app must model all the logic of the website, including users management, users profiles, points system (now i need it integrated with google play services), users comments, ratings & feedback. Some application features must work offline so it's needed to have an offline database with some data cached, and once the mobile is online app must sync with server database. Also I need a set of casual games for android integrated with the platform described above. The games are: - cooking game, cook and decorate a pizza. - dress up game, dress up and make up a girl. - car racing game, basic 2d car racing game.