Welcome to learning about intonation and singing – one of my favorite topics! In this video I talked about the different vocalization milestones:

Take a moment and place a checkmark in your workbook next to the types of vocalizing your child is using consistently.
References
Pepper, J., Weitzman, E., H Ayala Manolson and Mcgill University. Hanen Early Language Parent Program (2004). It takes two to talk : a practical guide for parents of children with language delays. Toronto, Ont.: Hanen Program, pp.151–163.