Going on road trip with 2 boys. They each have a mini. We are interested in buying a movie or 2 from apple store and then playing the same movie at the same time, for them to watch (each holding their own mini but movie is at the same point) in the back seat. How can we get the 2 iPads to start the same movie at the exact same time, so that the sound is not a few seconds behind....which would be uber annoying? We are not interested in just starting the movies at different points and having them wear headphones. So, is this an alternative? I hope I'm not totally confusing everybody. Lol. And,thanks.