How do you believe music therapy benefits your child?

I think music therapy benefits my daughter because she is going to be three months on the 22 and she never laughed or played (kicking, making faces) but ever sense I started taking her to music therapy she smiles and makes noises when you talk to her. I love the way she kicks and screams in music therapy class because it makes her so happy. So when we go home I sing the songs that we sing in music therapy to her and she starts to laugh its the cutest thing. i love music therapy class!