Back in my married days, and when my two boys were young (6-8 or so) we had a girl and then a boy from Colombia. It was a private thing, arranged by a mutual friend. It was a grand experience all the way around. My kids loved having a "big sister" and then a "big brother". Later I hosted a kid from Europe and that just didn't work out at all. Whether it does or doesn't work isn't a question of origin, but a question of basic personality.