Early works. five preludes ; Three fantastic dances, op. 5 ; Piano sonata no. 1, op. 12 ; Aphorisms, op. 13 ; Polka, op. 22a, from the ballet The golden age -- Mature works. Twenty-four preludes, op. 34 ; Piano sonata no. 2, op. 61 -- The masterpiece. Twenty-four preludes and fugues, op. 87 -- Works for children. Children's notebook, op. 69 ; Dances of the dolls.