I’d been taking my daughters to the Pearl Street pedestrian mall in downtown Boulder since each of them was old enough to be strapped on my front, facing out and taking it all in. Especially the music. Especially the deep, chest-thrumming tones of Per and Eileen Hultquist on their didgeridoos. They usually set up by the statues in front of Pearl Street Pub, creating their own little pocket of vibrations, literally. I’ve stood and enjoyed many a rare moment of peace as my baby and toddler zoned to the music and I watched the crowds gather, leave, and gather again. I had never, however, until this day, seen Per and Eileen give an actual “brain massage.” I knew this was the title of their CD series, but not a semi-literal service. On this day, my baby and I watched as this young couple clamped the earphones on, closed their eyes, and we all listened to the music.