I spent the better half of my childhood waiting in lines at my local Borders bookstore (RIP) to get my hands on the newest story about the Wizarding World and from ages 11 to 21 catching up with Harry on the big screen. Since there aren't going to be any new stories about Harry coming out — there are, of course, the Fantastic Beasts and Where to Find Them films, but it's not *quite* the same thing — this fun event gives your kids a chance to feel like they are experiencing a new release, whether they've seen the films or not.
Mark my words, your kids will remember this experience for years to come, just like we remember our childhood movie theatre trips spent with Harry, Hermione, and Ron.