Introduce The Concept Of Learning Through Fun
At this stage, it is amazing how your child absorbs things around him. While you may feel that your baby may just be having fun, but in actuality, he might be imbibing a lot of other skills from it. Your child with these fun rhymes will develop a sense for music and rhythm. Slowly you will realize that your baby will try to enforce his choice of music. It is fun how your baby will actually develop a sense of like and dislike through this.
Also, listening to music helps in development of language, listening skills and various emotions. These things may not be apparently visible in your child. But over the time, you will realise that his understanding of various aspects around him has shaped up because of his constant exposure to fun rhythms that he has always been exposed to right from an early age.