>> does gymnastics, going to show me videos. >> reporter: before russia invaded ukraine, flipping and dancing. now she can barely walk. we met her here in makeshift bomb shelter in basement of children's hospital. >> nurses say that six or seven times a day or night they have to bring the newborns with medical complications in and out of the room for hours at a time for their safety. >> reporter: windows protected by sandbags. march 16th, they fled from the port city of mariupol after enduring weeks of russian bombardment, jumping in back of a car with two strangers to escape. navigated many russian military checkpoints, then around noon