Potoman Spring ( Karol's Waltz ) Young String Series, Full Score, Easy to Medium Easy Level. This series has four different performance levels to provide you with a highly focused repertoire for your orchestra & string orchestra, Each level has been carefully designed and graded,within specific guidelines. Instrument Include: Violin 1, Violin 2, Violin 3 ( Viola T.C. ) Viola, Cello, Bass and Piano.