When you think of someone that is assertive, what comes to mind? Being assertive shows that you respect yourself because you're willing to stand up for your interests and express your thoughts and feelings. It also demonstrates that you're aware of others' rights and ready to work on resolving conflicts.  
Today's episode shows that it's alright to be assertive simply because of the assertive voice children use to teach others how to treat them, which isn't always a bad thing.