From "Metronome"

Jin opened up the book of exercises- a saccharine edition that he’d found online: “Sing After Me Echo Songs and Warm-Ups for Young Voices”. There were movement worksheets to go along with each song, but Jin was the only one who knew this. He could only imagine what a person like Ms. Weir would do if she got to move those purple colored tights in time with “Blue Brother Jake”.