Why do my 4- and 6-year-old insist on being on their absolute worst behavior when we go to visit family?

Parents are questioning why their 4-year-old and 6-year-old children consistently exhibit their absolute worst behavior during visits with family members. This recurring issue involves young children struggling with conduct specifically in the context of family gatherings. The situation highlights a common parental challenge regarding behavioral shifts in children when they are away from their normal home environment and interacting with extended relatives, leading to a need for understanding these specific behavioral triggers.