Many of the residents at Children's Home #19 are the sons and daughters of migrant workers.
Leon, who is five, is the son of an African mother and a Russian father.
Children of mixed ethnic backgrounds are harder to place with adoptive families, according to the home's director.
Some of the children were abandoned when one or both parents returned to their country of origin.
11-year-old Misha was taken into care after his father, an Azeri, was convicted of a crime and deported from Russia.
Children pray before dinner.
Akram, 16, is planning to record a rap album. He says he's proud to be from the children's home.
The home has placed 350 children in foster care or adoptive families in the past 15 years.
But a new law has abolished Russia's foster system, meaning the children can only wait for adoptive parents.