If living harmoniously is your goal, here are four rules for adult children living at home. Pour a glass and make sure there’s ink in your printer. Living with boomerang children can be 6 tips for living with boomerang kids. Try to get feedback from other families with adult children living. When a Parent Moves in With the Kids. A parent should consider putting his or her possessions in storage for a six-month trial period of living with the adult child.