We did this theme a couple of years ago. What our district did was to take games and crafts from all over the world and create a station around them. For example, we had:
Archery - England
Collage - France
Limbo - Jamaica
Bocce - Italy
We tried to be accurate about the known origin of the activity. (I'm sure we screwed up some, though!) What was really cool was that before camp we had made up den signs and each sign was for a country, and it had that countries Scout logo, and a boy and girl in native dress. We had researched the countries in advance, and had to come up with 1