New Bobbsey twins

Flossie brings the doll her grandmother gave her to show-and-tell and it is kidnapped! The Bobbseys set out to find the missing doll.

The Bobbsey twins devise a plan to catch the crook who stole jewels from the museum.

Freddie plans to make money to buy a new bike by baking cookies. Then the theft of his grandmother's recipe causes him to stop and search for the thief.