In their white bowler hats and Bolivian pollera skirts, the Indigenous all-female skateboard group ImillaSkate showed off their moves at the Folklife Festival —- and also taught beginner tricks ...

However, Derby hats typically have a round crown and an uneven brim that stands toward the ground when worn. However, a bowler hat usually has a round crown and its brim is made in an upward curve.

This year's Smithsonian Folklife Festival featured "Indigenous Voices of the Americas" and was full of surprises — like Bolivian women skateboarding in traditional garb — bowler hats and poofy ...