I would think if your child was being recognized because of a special acheivement or being honored, you shouldn't have to pay any money.
Sounds similar to a modeling "school" scam.
Just did a little search for reviews on this place and found the following article - http://www.nytimes.com/2009/04/19/education/edlife/leader...
What I found interesting is that (at least in 2009) 50,000 kids attended these "conferences". That's an awful lot of "special/gifted" kids, don't you think? The article noted that lists of students and their personal are purchased for tens of thousands of dollars. A university admissions person pretty much says that participation in these trips or conferences is meaningless on a college application. Teachers are hounded for "references" or "nominations. Your child's teachers didn't seek this organization out, in fact, it was quite the opposite, and thousands of mediocre students are receiving these invitations.. This organization has nothing to do with your child's school or education.
Sounds like nothing other than a clever marketing tool that is clearly working with parents that want to pay money to be told their kid is special and have them take an overpriced sight seeing trip with workshops that could all be done in your own town, for much cheaper. Scam, scam, scam.