How do you deal with grandparents who have different viewpoints on child discipline? It's a struggle trying not to get into arguments!

When we have different views on child discipline, I will avoid talking about the issue with the grandparents in front of my children. I will explain to the grandparents why I choose certain ways to discipline my kids and request them to respect my decisions. If they still interfere, I will keep the discipline behind closed door between myself and the kid.