Emily Cole and Shin-young Kwon, violins; Jennifer Arnold, viola; and Marilyn de Oliveira, cello, perform Mendelssohn’s String Quartet Op. 44 No. 2 and the String Quartet of Debussy. Free admission, but donations accepted for the Oregon Symphony Kinderkonzert Fund. At Ivories Jazz Club and Lounge, 1435 N.W. Flanders St. Portland, OR 97209.