It's bad to draw on walls with crayons.
Tammy's daughter Samantha learned how to draw a pretty tree in class today.
Samantha wanted to show the tree off.
Samantha grabs a piece of paper and draws the tree on that.
Samantha picks up a crayon and draws on the wall.
Tammy is thrilled, and thinks the tree is absolutely beautiful.
Tammy comes home, and is enraged and grounds her.