Bana Alabed is a seven-year-old Syrian girl with outsized optimism and lustrous brown hair that tumbles past her waist. She enjoys reading about dinosaurs, practicing English with her mom, and playing with her two little brothers, Mohamed and Noor. She recently lost a tooth, but the tooth fairy never came, because she lives under siege, in eastern Aleppo. “The tooth fairy is afraid of the bombing here,” she said. “It run away to its hole. When the war finishes, it will come.”