“He’s hitting me!” “She won’t get off the computer!” “He started it!” “I wish she’d never been born!” Guess what? While they’re living under your roof, you have the last say, so try saying these five magical words: Hold hands for three minutes.
Once they get past their horror (and you remind them it’s not an option) they may acquiesce. They’ll stand as far apart as possible and look toward opposite corners of the room, but a funny thing happens on the way to making up: they get the giggles (and you just might, too).