Another activity to do with the color/letters adhered to your keyboard is letter recognition. I printed the letters of the musical alphabet (A,B,C,D,E,F and G) on 3x5 inch cards and laminated them so they would last longer. I made several cards for each letter.
Place one letter on the keyboard and ask your child to play the corresponding key on the keyboard. Once all 7 letters are mastered, try 2, 3 or 4 letters at a time!