Parents with 2 or more toddler kids, how do you discourage jealousy among your children?

Try to spend time with each of them independently may help. Every child wants to enjoy their parents' undivided attention. Also, always assure them that you love both of them and ensure that you are not playing favourites (be it through actions or words). What one of my friends did is that she and her husband will have a day each with each child.