What does Amazon River rap sound like?

The sound of children rapping pulses from a tent on the Mall -- not the music you expect when you visit the Smithsonian Folklife Festival, which started up again Wednesday and continues through July 5.The hip-hop comes courtesy of Radio Ucamara, 98.7 on your dial if you happen to live along the Ucayali and Maranon rivers, which are tributaries of the Amazon in Peru.