This is an excellent animated video made by the Anna Freud Centre from England. It's a nice way of introducing the importance of talking about one's feelings, thoughts and needs to your child. It's quite important for them to know they don't have to bear their feelings alone and that talking about them with a person who they could relate is a way cope so that these feelings, thoughts, and needs can be held by the relationship.
https://www.youtube.com/watch?v=2hVAPFyukvY