FL Studio is without doubt the easiest composing software especially for beginners... the Piano Roll is really quick and easy to get ideas down. http://www.image-line.com/flstudio/
Down In the Valley is an old-fashioned song with sweet lyrics and a strong melody. Resting around Middle C & using just 2 chords, it makes a fine duet or solo!
Short aria Nel cor with piano accompaniment in the keys of Eb, F, and G! This pretty little aria is perfect for students just venturing into classical music.