Bartók composed his first pedagogical collection For Children between 1908 and 1911. The first edition was issued between 1909 and 1911 in four volumes, comprising two of Hungarian and two of Slovak folk- song arrangements. After moving to America, Bartók considered it important to produce new editions of his earlier works. Thus in autumn 1943, together with his new publisher Boosey & Hawkes, he planned a new edition of For Children, and to this end completely revised the collection. Although Bartók had already completed his revision by the end of 1943, the revised edition was only issued in 1946.