When it's time to teach my child (she's 4 months old right now) her ABCs and 123s, I'm interested in also teaching her the building blocks of music. Intervals, scales, triads, etc. My thinking is, in the same way that we can from sentences and do simple math without thinking about it, I want to give my child the gift of being able to form simple melodies and songs "without thinking about it". With this foundational knowledge, if she chooses to pursue music as a career or as a hobby or w/e, I feel that she'll have an easier time.
As an example, I was taught to read, write, and perform simple arithmetic in grade school. Ultimately, I prefered math over language arts or social sciences, and eventually went to school for engineering. I didn't reallt enjoy or appreciate my english and history classes all that much. Today, however, I find myself going to to read classic texts, as well as seeking a more detailed understanding of history. I am greatly appreciative that I, a) know how to read, and b) have a basic enough understanding or literature and history to know what to look for. With music, however, I've had to start from the ground up and I've found it difficult (despite my few years learning saxophone in middle school). To that end, i'd like to provide my daughter with the tools she'll need in order to appreciate and understand music, and ultimately create it (if she wishes). If she ends up not caring for music at all, I don't think she'll be any worse off with this knowledge.
My question is, what are some resources I can use for establishing an age-appropriate curriculum along these lines?