Two grandsons... a year apart. Do you have any windows that aren’t broken at this point? LOL. In public, I expect good behavior and for the kids to act like little ladies or a gentleman. At home, they can let their true “hooligan” nature come out and vent their steam and energy. I would rather “saints” in public and “demons” at home than the opposite.
It's usually about 20 to 30 minutes of relative calm followed by 5 to 10 minutes of "venting". Then the cycle restarts. My daughter drops them off on Thursday morning and picks them up Friday evening. We're always glad to see them, but my wife and I high-five each other upon their departure. :)