Have students bring in any postcards they have from different countries. You can display them on a bulletin board, surrounding a global map.
Students can cut pieces of yarn and attach the postcard to the country it is from.
Have students learn about the flags from different countries. They can even make up their own flag for the classroom. Celebrate the independence day of the different countries that your students' ancestors are from. If there are any countries that do not have an independence day discuss why or why not. Introduce students to the music of different countries.