Mozart twiddled his thumbs in Munich by writing the Piano Sonata in B-flat, K. 281. It's played at Piano Festival Northwest by Noriko Ogawa. Then excerpts from his Serenata "Ascanio in Alba," written for the Duke of Milan, and recorded by the Mozarteum Orchestra and Salzburg Chamber Choir. And two dances from the ballet "Les Petits Riens," that he wrote for Paris. The students at the International Summer Academy of Early Music are playing in Warsaw.