'Topsy-turvy Tunes'' is a unique collection of Carol Barratt's compositional wizardry that will amuse and amaze young pianists. Each piece hat to be played in an unusual way - with hands crossed, with the music upside down, or in unfamiliar positions and rhythms. Both entertaining and challenging, ''Topsy-turvy Tunes'' will develop many aspects of piano techniques, especially independence of hands, articulation, and familiarity with the keyboard. And above all, they're fun!