One of a series of apps developed for the Flandra Science Center (Tucson,Az) that are based on existing Java-based games played on large touch screen museum displays. The apps were designed for iPad so they can be used by children at outreach events.

Users are presented with a view of the periodic table with buttons corresponding to a selection of elements. They must tap the correct buttons to answer the displayed question. If the answer is incorrect the button is greyed out and disabled. If correct, the user is taken to a screen showing more information. System Sound Service is used to play different sounds depending on the answer.

The NSUserDefaults class is used to save and update application settings such as points for a right answer, and total number of questions. The app also comes with a set of default values for these settings stored in a plist.