I just love that Epcot can be educational for children and that your daughter is interested in learning about the countries. Here is a basic list of the landmarks she will find in the World Showcase at Epcot starting from left to right:
Mexico: Aztec Pyramid with a marketplace featuring authentic Mexican goods
Norway: Norwegian architecture and village
China: Temple of Heaven, Tomb of China's first emperor, Chinese gardens (beautiful!)
Germany: modeled after a 16th century German town, Bavarian Clock Tower, Statue of St. George and characters from Snow White appear here
Italy: (Where my husband and I were married) Neptune Fountain, Campanile of St. Marks Square (bell tower), gondolas
American Adventure: Colonial style structures
Japan: red torri gate, rock gardens, gorgeous landscapes, the taiko drummers
Morocco: typical Moroccan architecture, Fez house, belly dancing
France: Eiffel Tower, typical French marketplace
United Kingdom: English village with cobblestone streets and British architecture, Pub (yummy desserts), British phone booths
Canada: Canadian Rockies with waterfalls, totem poles
Each pavilion offers a wealth of culture for adults and children. Have your daughter participate in the Kidcot Fun Stops
at each country and create a fun craft to take home. You can also purchase a Passport kit, where each country will stamp the passport and write your daughter's name in the native language. My son, also 4, LOVED doing this.
Have a magical day!