In 1997, we had a party with this theme. I baked the cake in an ovenproof bowl instead of a cake tin to get the curve I was after because, no the world isn't flat (shock horror). I iced it in blue icing. Then I used ready made icing in green and carefully traced on and cut out maps of half the world's land mass. In our case, Africa was foremost of course!
At the time, it was possible to get little flags on toothpicks, and I stuck those into the cake where appropriate
I didn't try to get clever with the rest of the eats, but placed them all around the cake, directly onto the tin foil wrapped table (as is my wont). The space was decorated with flags and pictures from all over the world.
|Of course, those two flags had to be there!|
You could invite the children to dress up if you like, but that might result in stereotypes that some people may find offensive. It depends on how politically correct (and incorrect) your friends are!