The reality TV family is promoting their new book, Strong & Kind.<br />Duck Dynastys Willie and Korie Robertson explain how Willies pranks cause a little mayhem on set. Subscribe NOW to The Tonight Show Starring Jimmy .<br />Korie and Willie Robertson dish on their family traditions -- and having a too-tall tree! SUBSCRIBE to PEOPLEs channel: .<br />Will Ferrell talks to Jimmy about his 30-year Little Debbie contract and what happens when his children get in trouble with the snack cakes spokesman.
