She frowns, bewildered -- not because his story strikes any familiar chords with her, but because it's hard to reconcile what he's saying now with what he said before. Either he was taken from a place with no grown-ups -- and if that's true, how did he get there in the first place? -- or he was taken to a place with no grown-ups -- and if that's true, that'd mean he was kidnapped by another child, or group of children, which is hard to imagine and doesn't make much sense.

"So... did you start off in a place with no grown-ups? Or was it a bunch of children who took you away?" She just assumes it was a group, and that one child didn't haul him off.