"baby sleeps in the clouds with a very soft sound" suggests a peaceful and relaxing scene where a baby would be sleeping comfortably in an environment surrounded by clouds, accompanied by a soft soothing sound that would help calm and relax the child.
It could be an image of a mobile crib where the clouds would be hung and a nature sound or soft music would play for the baby.
It is a romantic and soothing idea to help the baby sleep better and feel safe and comfortable.