In this sense yes. The phrase "real passengers" can be interpretted differently, more seriously.
But I am not sure the drivers are children. And even if they are, of course not the yongest ones. And if 14/15 year old is allowed to drive after getting trained, it is not a big problem, I think. In some countries 15 year olds can drive cars.
In any case, this railroad is supervised by adults. It is more of an educational establishment.
We have such a railroad here in Minsk. I never cared to visit, even when was a child. Although I briefly knew one person attending it, he was dreaming to work on railroad.
