Experts have long known that children imitate many of the deeds — good and bad — that they see on television. But it has rarely been shown that changing a young child’s viewing habits at home can lead to improved behavior.

Permanently dyeing hair goes hand in hand with damaging it. The process dries out hair and leaves it jagged. Ammonia used to open the hair fiber so that dye molecules can nestle in — is as delicate as a can opener. It also smells horrid and sets delicate scalps afire.