Santa offered a toy keyboard to my 4-year-old. He enjoys the provided scores, but I'd like to add some songs that we sing together and that are not included in the basic set. Every Key has a symbol (circle, triangle, square)
and a color (blue, yellow, purple, red, orange)
that is displayed on top of the music score, to help him figure out which keys to press.
I'm not a musician, but I do have a basic understanding on how to write music scores. I've never used lilypond, but I'm a developer and I know latex.
I tried searching for a way to add extra symbols, but I'm not sure this is feasible.