Listen to Variations on a Nursery Song, Op. 25: Introductions (Maestoso) online. Variations on a Nursery Song, Op. 25: Introductions (Maestoso) is an English language song and is sung by London Symphony Orchestra and Ernö Dohnányi. Variations on a Nursery Song, Op. 25: Introductions (Maestoso), from the album Variations on a Nursery Song, was released in the year 2017. The duration of the song is 3:02. Download English songs online from JioSaavn.