One of the core concepts of my approach to teaching music to young children is the use of colors to represent pitches. I’ve used this with great success on both piano, guitar and in reading music notation.
Those of you studying with me have already seen my piano covered with translucent tape and my guitar with colored stars up the fretboard.
Here’s a link to that highlighter tape that I use. Thanks to my son’s first grade teacher Melissa for the great tip.
This pack will last you a long long time.