This image shows a Kostka family of 6.

The head of household is John Kostka, age 50, born in May of 1850.
His wife, Natalia, is age 52, and was born in May of 1848.

Their son, Frank, is 19 at the time of the census, and the record indicates that he was born in March of 1881.

A second son, Stanislaus, age 15, was born in December of 1884. (The census was taken in June of 1900).

Son Joseph Kostka was born in October of 1885, and is 14 when this record was made.

The last member of the family listed appears to be that of a son, Leon, who is 12 years old, born in January of 1888.