Future Indy Car Driver

It's not bad enough that he already wants to drive but that he looks totally natural doing it is not good. He has his hand on the seatbelt like a gun in a holster and when the car stops, he's in the front seat driving. Yesterday, he even pushed the lock down on the door thinking that would keep me in so he could stay in the front and drive. He has control of the radio and whatever he wants has to stay on or he gets angry. We're going to have to hide the keys!