S. M. Prokudin-Gorsky liked to photograph children though each photo cost 10 rubles, it was a huge amount and the photographer was not rich, but he continued to take photos of kids because he liked them (he himself was a father of four).
One of his most famous photos taken in Belozyorsk 1909
1904-1905, the Crimea
1906, but it’s not in Russia, but probably near Lyon, France
Nizhny Tagil 1909-1910
Near the mosque
School in Samarkand