The Addams Family Values

When an adorable baby boy is added to the Addams household, Wednesday and Pugsley do not hate him, they just aren't necessarily excited about his existence. OK...yeah, they do hate him. So they plot to get rid of him one way or another. Meanwhile, their parents hire a nanny for him and she charms Fester, but has evil intentions for him. The Addamses must stop her, but how?