Essence of Clarity & Joy
Your child needs YELLOW to support clarity, joy, assimilation (both physical and mental; good for studying), to support issues with lack of ego, when they are confused, for Seasonal Affective Disorder (SAD), when they have feelings of fear, or to support positive thinking or any mental activity.
Use yellow when your child enters a new grade in school and during the year to augment the assimilation of knowledge or to celebrate any joyous occasion.
Your child has too much yellow when their ego is overly large, when they are certain that they are always right, and if they tend to be selfish and/or self-centered.
You can counter this imbalance by adding PURPLE to their life.