The toy the Bobbsey twins buy as a Valetine gift soon puts them on the trail of two men conducting a fraudulent antique business.

"Beware Four-winged Blackbird," is the warning that introduces the Bobbsey twins to mystery in Canada where they search for a missing friend.

" The Bobbsey Twins is a beloved children's book series written by Laura Lee Hope. The series revolves around the adventures of two sets of twins: Nan and Bert,

The Bobbsey twins help capture two bank robbers at Meadowbrook.

When the Bobbsey twins ponder the perfect Christmas gift for Mother and Father, they decide upon Project Santa Claus.