A lullaby is a peaceful melody that has been calming infants for centuries. These tunes are often easy in arrangement, with constant melodies and lyrics that tell stories.
A good lullaby can induce slumber quickly, https://youtube.com/playlist?list=PL9MA18nixW__bOMUT9dxRavfZM82qEeYy&si=TUbK6WSPIpr-1n66