Bullshit. Kristen is 9 and in shoes she's barely 51 inches.
Sure there are kids taller, but if I was a betting man, I'd say most 9 year olds would be totally hit & miss on a 54" height restriction. A 10 year old, you're getting closer. But 9? No way most 9 year old kid is going to make it on, not even close.
After doing some research (because I was curious) turns out an average 9 year old child is going to be about 49-52 inches (without shoes). Obviously there are some that will be taller, but the average is 49-52 inches (Without shoes)... So I'm not sure where the:
comes from.