The "5 Gift Rule" for Christmas is a tradition that many families follow, which states that children should receive no more than five presents from Santa Claus on Christmas morning. This rule is based on the idea that excessive materialism can distract from the true meaning of Christmas and make children less appreciative of their gifts. It encourages parents to focus on giving gifts that are meaningful and have sentimental value, rather than just giving lots of gifts for the sake of it. It also helps to teach children the value of moderation and to appreciate the things they already have.