They need to know there will still be rules. And of course, the most important thing that stays the same is your love. Children need ways to express their feelings. Children can have lots of sad and angry feelings about the divorce and all the changes it brings. Those feelings can last a long time.
Children can get their feelings out by drawing, playing, and making up stories.
Read children's books about divorce. Talk about the story and the pictures. Children need to know it is ok to have their own feelings about each parent. Let your child know it is ok to like being with the other parent. That may be hard for you, but children feel better when they have some good feelings about both parents.