They use foreshortening to depict the figures projecting into the viewer's space.
The answer is scrapbooks. The quilts are named after the scrapbooks that are being kept by the Baltimore girls. The quilts use images and being combine to have a finish work. The work holds together as a whole. Hope this helps.
Check out this link.
http://takelessons.com/blog/piano-pop-songs-for-everyone-z06
Also songs from movies or plays are also good.
