Many museums are interested in creating or hosting exhibitions on "cultural" topics. However, many such exhibitions often run the risk of reinforcing cultural stereotypes, or focusing on the strange habits, customs, clothes, of "other" people. (Adding plastic pineapples and plantains to your grocery store exhibit does not mean you now have a cultural exhibit!)
Two wonderful books that may well provide interesting starting points for creating more thoughtful (and thought-provoking!) cultural exhibitions are:
Hungry Planet: What the World Eats
and
Material World: A Global Family Portrait