Planning - Non diegetic sound ideas

Our group wanted the sound in our film opening to have a spooky feeling so it relates to the horror genre. However, because we are including a doll/baby in our opening, we thought we needed to come up with a sound that linked to this idea also.
The best idea we came up with was the music from a baby mobile. This is because we believed it will sound scary with the on screen footage we will be using. Also, it links to the idea of a doll/baby because mobiles are commonly used above a baby's cot to help them sleep. The video above is an example of a mobile which gives an idea of the sound it will create in out film.