Children need to learn to share so they can make and keep friends, play cooperatively, take turns, negotiate and cope with disappointment. Sharing teaches children about compromise and fairness. They learn that if we give a little to others, we can get some of what we want too. Sharing is a key part of getting along with others, so it becomes more and more important when your child starts having playdates and going to child care, preschool or kindergarten.