Marcos constantemente escucha a sus papás diciéndole cosas como "No comas como pajarito" o "No seas cochino y recoge tus cosas" o "No te hagas pato"; y resulta que el libro sobre animables que está leyendo, desmiente todas esas afirmaciones de sus padres. Marcos tendrá que decidir quién tiene la razón.
 
Marcos constantly hears his parents telling him things like "Don't eat like a little bird" or "Don't be a pig and pick up your things" or "Don't act like a duck"; and it turns out that the book about animals that he is reading denies all those statements of his parents. Marcos will have to decide who is right.