The last major event we attended at the Folklife Festival was the human tower, put on by two teams from Valls -- Colla Joves Xiquets de Valls and Colla Vella dels Xiquets de Valls -- said to be among the best in Catalonia. Participants can be any age or gender, and indeed there were men and women and older folks as well as small children taking part. Spectators were told to hold their applause and shouts until the towers were completed because the climbers need to hear the music in order to understand the progress being made and the next steps.
A short VIDEO of the making of one of the towers is at http://vimeo.com/279043268
Portrait of a musician, posted earlier: