Composed with strong idiomatic concepts, from classical to jazz, from romantic to ragtime or tango, from Ravelian atmosphere to Fauréan feeling, these short variations on "Happy Birthday" maybe be played in any order. Each performer thus "composes" her/his own cycle of variations. A 4-hand version provides young pianists with a ready opportunity to play with family members or friends. Teachers may also use this option to accompany their students. These pieces ranged from easy to medium difficulty, and are great pedagogical tools to accompany budding pianists throughout their studies. For beginning to intermediate-level players.