Kids tell us that they don't like being teased about their freckles, so if you know people who have freckles, please don't make fun of them! Let's find out what freckles are and why some people have them.

Being outside in the sun may help cause freckles or make them darker. Who's most likely to have freckles? People, especially kids, who have fair complexions. That means their skin and eyes are light in color.
http://www.kidshealth.org/kid/talk/qa/freckles.html