Bring toys into the classroom that represent various cultures. For example, bring in dolls with a variety of skin colors and features. As dolls are largely modeled after people, this will help children associate the differences in the dolls to the differences in physical attributes of people.
Supply your classroom with books that are written by authors from around the world. Have several book examples of each culture that you wish to represent, and read the books aloud to your preschoolers. Pick certain days to teach your students about a culture or country. For example, introduce several books that are written by Japanese authors on Monday, and introduce works by German authors on Tuesday.
Explore the differences between cultures through hands-on activities. Teach your students age-appropriate songs from other cultures around the world. Look for preschool-appropriate CDs, and teach your students what the song of the day represents for that particular culture.
Create art projects that illustrate other cultures. For example, pass out coloring sheets that show people from another culture or examples of their homes or cities.
Introduce your students to other cultures through food. Offer ethnically diverse foods at snack time. For example, have a Mediterranean day and offer your students hummus with pita and tabouli. For a Chinese culture day, bring in a stir-fried rice and vegetable medley. Teach your students about the significance of the foods that other cultures eat.