interesting that they divide children by height and not age, and likewise adults are judged by height ("above 1.4m") - although there doesn't seem to be a category for adults below 1.4m tall. Too bad for them I guess.
Probably going by the logic of how much physical space each person takes up, which sort of makes sense with the safari buses.
so foreigners should be much more expensive than locals, being much larger. And they should have a waist-measurement category as well.
It probably is a subtle pricing strategy targeting Caucasians. Less offensive than "Farang" prices in Thailand!