"Look!" says Stefania Poggi. "They've made inflatable rafts."
Two dozen boys are splashing in a massive, muddy pool surrounded by 30-foot-tall earthen banks. They're jumping on grain sacks that they've filled with plastic bottles to make them float.
Poggi manages the Doctors Without Borders operation in the largest refugee camp in South Sudan.
The 35-year-old Italian is standing on the banks of the drainage ditch, which was bulldozed through the middle of the camp to alleviate flooding.