Inside the courtyard, the air is filled with the bright, unfiltered sounds of childhood. Laughter bounces off the playground equipment, the sharp ring of a recess bell echoes across the pavement, and children race across the grass with backpacks swinging. It looks like any other schoolyard anywhere in the world.   Yet, just yards away lies a starkly different reality. This school sits in the Eshkol region along the Gaza border, an area where the shadow of conflict is never far behind. ...