Listen to Variations on a Nursery Song, Op. 25: Introduzione Maestoso online. Variations on a Nursery Song, Op. 25: Introduzione Maestoso is an English language song and is sung by Hungarian State Symphony Orchestra. Variations on a Nursery Song, Op. 25: Introduzione Maestoso, from the album Piano Concerto No. 1 / Nursery Variations, was released in the year 1996. The duration of the song is 3:40. Download English songs online from JioSaavn.