Stack the Countries is a fun geography app available for the iPad, the iPhone, and the iPad Touch. The game requires players to correctly answer a geography question in order to earn a game piece that they then place into a row. The object is to stack up pieces to reach a target height. When the target height is reached players move on to the next level.

The free version of Stack the Countries allows players to move through ten levels before the levels start to repeat. The paid version of the app costs $1.99.

Applications for Education
Playing Stack the Countries could be a fun way for elementary and middle school students to develop their knowledge of world geography. The developer of Stack the Countries also offers Stack the States which uses the same concept for learning about U.S. geography.

Thanks to Jen Deyenberg for the tip.