Trimpin is a musical genius who builds room-sized art installations that are also instruments. Picture a Rube Goldberg machine exploded all over a room, but one you can play Beethoven on. This year, Trimpin again partnered with students from Path with Art, a nonprofit that works with homeless people to create original works of art. Together they constructed a new sound sculpture bursting with poetry, visual art, and, of course, music. The resulting installation has been traveling around the city. by Rich Smith