A pulley system is probably something that Horvath can help with, now that he's heard the idea, and from the rubble he's already set aside he finds a long beam that still seems sturdy enough, moving it into position so they can make use of it for that purpose.

Now that his digging has brought them closer to reaching the trapped kids, those helping up above can hear the sobbing, faintly. It's both a welcome sound and a worrying one.