Give your students an opportunity to share information about their own culture or about another one they are interested in. Presentations can be as formal or informal as you'd like. Students can either just speak to their classmates, use technology to present, or write a report.
My students love to present for "Cultural Fridays". We saw a student share a New Zealand rugby war chant and share the significance of a Bindi. We have kept it low key and simple. Students love the chance to share something and other students enjoy learning about other cultures.