nemat ayub is 14 and came here on her own. she walked the 200 kilometers to yida, in south sudan. >> we have escaped from the war. and because we are teachers from the mountain, we are now trying to assist our the children as well as possible. >> getting to yida isn't easy. our trip coincided with the rainy season and the entire region was flooded. our flight was delayed three times, so we had to wait for days. but finally we took off for yida -- a village that's now home to almost 70,000 refugees. nemat ayub is one of almost 3,000 children who've come here without their parents. they live in this camp and are cared for by the un refugee agency unhcr. gladys nyamai-tap is herself a former child refugee. twenty years ago she fled the civil war in southern sudan and crossed into neighboring kenya. so she understands the hardships these children face. they live in cramped quarters with no proper beds or shoes. there's no variety in their diet -- they eat millet every day. like the others, nemat has no money to buy vegetables or m