After preschool and maybe kindergarten, drawing is downgraded to an extracurricular activity. And so drawing becomes "doodling"-- a term that implies a frivolous activity.

Christine Thompson, Drawing Together: Peer Influence in Preschool-Kindergarten Art Classes, Visual Arts Research, Vol. 25, No. 2, Context in Early Artistic Learning (1999), pp. 61-68 ...

Kansas kindergarten teacher Ashley Hicks just wanted to revive a tradition she learned in high school. But she ended up an internet star.