Smashing record? What they had done for humanity?
In my opinion is a bad idea to add too much pressure to kids, making them compete in contest with absolutely no useful outcome.
When I was a kid I entered Mensa but went out soon because of the ill competition "I am smarter than you" stupidity from tests that had nothing to do with the real world. A constant ego battle between (in lots of non testable ways) retarded people.
For me it was mental onanism, most of the people there will score enormously in the IQ scores or playing chess but then fail in life: fail in love, fail in relationships and fail in health. They will use excuses to rationalize the fact that was known to them but I could see why: the environment was vicious.
In contrast at 15 or so I joined a group of crackers that were dam smart and we were doing things. Forty years old experts would say a protection was impossible to break and we will break it that same weekend.
It was so fun and we were doing things that nobody had done before. We did not earn a penny but it was one of the most useful experiences I ever had: Getting used to do things nobody has done before with a good team does improve other people's lifes(and your own as a result) dramatically.
Had I been forced to do that when I was a kid I would never had done it.
I was told I was genius, then that I was not(when I refused to make IQ scores anymore),just a precocious kid, and it was a great release, I had not pressure over my shoulders to please others' expectations.
I could do as much dumb things as kids do. I was happy as a kid, and I am very happy as an adult.
I feel sorry for this girls. Let girls be girls. Don't make them symbols of women fight against XY chromosomes. Let those girls decide if the want to become activist when they had grown up and could decide for themselves.