It's a rare privilege to watch Christie Brinkley step in front of a camera. Flashing her signature smile, she twists, turns and tosses her golden hair, each pose more interesting than the next.

With 1.4 million school-aged children, New York City has the nation’s biggest public school system, the densest concentration of private schools, and intense admissions competition for the under-5 set.

Regardless of which smartphone you call your own, there are hundreds of applications made specifically for families.

We chatted with some NYC dermatologists to get the skinny on summer in the sun. The result? Sun care that’s as simple as 1, 2, 3.