If you can't break a rule, outsmart it. That's what a few British high schoolers have done. Wearing colored nail polish is against their school's dress code, so they developed a nail polish that's red in sunlight, but looks clear inside.
How does it work? The polish reacts to ultraviolet light, which is why the color changes. The students came up with the idea while working with professors from an area university, and the academics were so impressed that they created a formula with the girls. (They're working on manufacturing it for the general market.) I love this story because it shows that being interested in beauty doesn't mean you're a dingbat. And anything that lets girls show off their ingenuity and problem-solving skills is a plus in my book. Would you buy their polish?