Back when my daughter was in third grade, parents were invited to the classroom to talk about their jobs. I talked about trademarks and brands, discussing products they would appreciate, like HOT WHEELS miniature cars and AMERICAN GIRL dolls. At one point, I told the students that a color can be a trademark and that Mattel claims the right to the color pink as a trademark associated with their BARBIE products. A little girl named Emma spoke up and said, "That doesn't seem fair that just one company can use a color."