How do you get the folding wing in banjo nuts and bolts?

To unlock the folding wing in "Banjo-Kazooie: Nuts & Bolts," you need to complete the "Banjoland" world. Specifically, you must collect all the Jiggies in that level and then finish the associated challenges. Once completed, the folding wing will be added to your vehicle parts, allowing you to build vehicles with the ability to fold their wings for better maneuverability.