Okay kiddo, so New York v. Ferber is about whether or not it's okay to make and sell pictures and videos of kids doing sexual things.
Now, most people know that it's really bad to touch kids in a bad way, right? But sometimes, bad people like to watch videos or look at pictures of kids doing those things instead.
So, a law was made in New York that said it's illegal to make and sell those kinds of pictures and videos.
But some people said that's not fair, because it's a form of free speech. The case went all the way to the Supreme Court, and they said that the law is okay because it's important to protect kids from being taken advantage of.
So, New York v. Ferber is a case that helps keep kids safe from bad people who make and sell pictures and videos of them doing things they shouldn't have to.