If that kid is even in there.
When I was a kid I used to read up on old literature, always loved Tom Sawyer. Of course the ending to that has them stuck in a cave, trapped, lost. Only when their last candle burns out do they see light coming in from a secret exit.
We might want to poke around the neighboring stones, see if we can find some tracks. Or bodies. Might be able to find a back door and circumvent all this waiting business.