Ideas to set up a diverse group atmosphere

Displays and posters depicting children of all races and cultures interacting.
Books showing a wide range of children and families from diverse backgrounds.
Puppets, story sacks, puzzles and games, colouring sheets all depicting diverse topics.
Home corner and dressing up box can have clothes and themes reflecting different cultures.
Having diverse dolls available reflecting all nationalities with appropriate clothing
Focusing on the group as a community and then extending outwards to families and other classes in the kindergarten is a good way to create unity and understanding of similarities and differences.
Diverse cooking activities including potlucks.
Guests can be invited to talk about their home and culture. Parents can be invited as well to come in one at a time and share aspects of their culture or home environments.
Emphasize to parents the importance of welcoming new families into the atmosphere.
Puppets to present social/emotional issues to the group