My daughter got an invitation for this program too, last year when she was in elementary school, but we declined to let her participate for several reasons; she was only 10 and they wanted her to go on a trip to Europe without parents, with people we've never met before, and for a hefty "tuition" fee. Nope, we passed on it. I think they get listings of kids names if they are on the honor roll or something, because my highschooler son, who has only just gotten on the honor roll recently, actually got one of those invitation letters a few weeks ago for a trip to somewhere far off. I can't recall where it was but the letter went right in the shredder.
That said, I do know a girl who went on one of these trips when she was 12 and she had a blast. They spent bucks for it though. They went somewhere in Europe, but at some point during her trip she was involved in a car accident and had to be taken to the hospital as a precaution (she was okay). But her parents were flipping out being so far away when their kid was in a hospital overseas.