Want to give a real gift with real impact? You might never meet the person you help—but you'll make a world of difference in their life. Unicef makes it easy with online gits—and a little can go so far. Just $10 buys 3 bed nets to protect from malaria and mosquito-borne illnesses; $12 buys 21 nutrient-rich bars, and $30 buys 129 (!) polio vaccinations.