I believe this caused so many problems in Jacob’s family. The fact that Joseph was the favourite led to what? It led to the other brothers hating him. If you read Genesis 37 you will see how this unfolds. In v.3 we read that Joseph was loved more than the other sons by Jacob. The result was in v.4 that the brothers hated Joseph. Favouritism causes great harm. Your children need to know that they are each equally loved and equally appreciated. Tell them this. Never for one moment should you do anything to give the impression that you have a favourite among your children. They are equally loved.