<P> The Bobbsey Twins are the principal characters of what was , for many years , the Stratemeyer Syndicate 's longest - running series of American children 's novels , penned under the pseudonym Laura Lee Hope . The first of 72 books was published in 1904 , the last in 1979 , with a separate series of 30 books published from 1987 through 1992 . The books related the adventures of the children of the upper - middle - class Bobbsey family , which included two sets of fraternal twins : Nan and Bert , who were 12 years old , and Flossie and Freddie , who were six . </P>
<P> The Bobbsey Twins are the principal characters of what was , for many years , the Stratemeyer Syndicate 's longest - running series of American children 's novels , penned under the pseudonym Laura Lee Hope . The first of 72 books was published in 1904 , the last in 1979 , with a separate series of 30 books published from 1987 through 1992 . The books related the adventures of the children of the upper - middle - class Bobbsey family , which included two sets of fraternal twins : Nan and Bert , who were 12 years old , and Flossie and Freddie , who were six . </P>
what are the names of the bobbsey twins
what are the names of the bobbsey twins
Nan and Bert Flossie and Freddie
Nan and Bert Flossie and Freddie