Gradations is music of variety, of change, of progression, of growing up, even. Mozart’s first keyboard minuets are here, as is a pair of Marcello sonatas. A sonatina by Clementi sits alongside 'Kaleidoscope' by Benjamin Lees. Bartók and Bach knew all about children’s keyboard development and are each represented by absolute gems. César Franck’s Doll’s Lament and Kabalevsky’s My stubborn little brother represent more negative childhood emotions, but in the main this...