From Wikipedia

Children Underground

Children Underground (2001) is a documentary film directed by Edet Belzberg.

Homeless children are the casualties of Romania's recent history. In an effort to increase the nation's work force, former communist leader Nicolae Ceausescu outlawed contraception and abortion. Thousands of unwanted children were placed in state orphanages, where they faced terrible conditions. With the fall of Communism, many children moved onto the streets. Some were from the orphanages. Others were runways from impoverished families. Today there are 20,000 children living on the streets. The resources for sheltering these homeless youths are severely limited.

 Children Underground follows the story of five street children, aged eight to sixteen who live in a subway station in Bucharest, Romania. The street kids are encountered daily by commuting adults, who pass them by in the station as they starve, swindle, and steal, all while searching desperately for a fresh can of paint to get high with.