A lullaby is a peaceful melody that has been pacifying infants for epochs. These songs are often simple in arrangement, with repetitive melodies and verses that tell stories.
A good lullaby can induce slumber quickly, https://youtube.com/playlist?list=PL9MA18nixW__bOMUT9dxRavfZM82qEeYy&si=TUbK6WSPIpr-1n66