LISEN Tablet iPad Holder for Car Mount Headrest - iPad Car Holder Back Seat Travel Portable Car Tablet Holder Mount Road Trip Essentials for Kids Adults Fits All 4.7-12.9" Devices & Headrest Rod https://a.co/d/5duiZMY

For around 2k you could get 4 iPads and 4 noise canceling headphones and the associated car seat clips. Another $100 you get longer cables/car adapters to keep the iPads plugged in.

Another benefit is the kids don’t ask you to turn on [insert show here] whenever they get in the car even for a 5 minute drive down the street.