关卡： Europe 1914

关卡： Europe 1919

关卡： G20 Member Countries

关卡： The Six Cradles of Civilization

关卡： The U.S.: 13 Colonies

关卡： The U.S.: 15 Least Populated US States

关卡： The U.S.: 15 Most Populated US States

关卡： The U.S.: Acquisitions of Territory, 1783-1853

关卡： The U.S.: Great Plains States

关卡： The U.S.: States in the Midwest

关卡： The U.S.: States in the Midwest and the West

关卡： The U.S.: States in the Northeast

关卡： The U.S.: States in the South

关卡： The U.S.: States in the South and the Northeast

关卡： The U.S.: States in the West

关卡： The U.S.: States West of the Mississippi River

关卡： » 30 Most Populous Countries

关卡： ░ Europe: Flags (Easy Version) (with Kosovo)

关卡： ░ The U.S.: The Founding Fathers

关卡： ░ World: Very Similar Flags

关卡： National Hockey League (NHL) Teams