Why wouldn't he ask one of the people closer to his own height, even if he can't tell who they are? Obviously, similarities in height mean other similarities too. Like temperament. Maybe it'll mean he gets some sympathy.

... It definitely doesn't mean he gets any sympathy.

But they're not rude, either, just blunt. And they are trying to help. So he nods, a little more frantic than he means to be, and he takes three very deep and obvious breaths. "Okay," he says. "There. Who are you? Do you know my name?" His head tilts curiously to the side. "Are you a boy or a girl?"

The idea that the question might be impolite doesn't cross his mind. His only interactions before now have been family; they don't stand on formalities.