This photo is a bit of a puzzle. Most of the children are wearing shorts, except for a few in yellow robes. Online, the same photo shows eight wearing robes, four in pink and four in blue. I pulled out my magnifying glass, and from what I can tell, they are all boys.
"Brighton Beach" (New York) (pre-1910)
History shows that Russian immigrants settled in Brighton Beach prior to 1910. It explains why many residents today speak Russian. Jewish holocaust survivors also settled there after World War II (estimated at 55,000), as well as Non-Jewish immigrants because of the Russian language (Armenians and Georgians). The ethnicity of Brighton Beach probably explains the children in yellow robes, but I have no idea which immigrant group they represent. Do you?
[Gravseth family archive; American and foreign views, pre-1910]