I taught all three of my kids that when a policeman stops you, you place both hands on the steering wheel at the 10 and 2 position, and you do not move them unless the officer instructs you to do so.
If you are getting your license, you tell the officer where your wallet is and that you are going to reach into your pocket or the dash to get the wallet, and you do so when he says you can do that.
I told them that is for your safety as well as the cop’s.
I have done this myself when stopped by a cop, and never a problem.
What do you tell the kids to do when they are passengers? Hands on the dash?