Julia was trying to boss me around (something we've been working on lately!), and I gently but firmly reminded her that she isn't my boss and that she needs to ask me nicely when she wants something. She promptly replied, "I'm just practicing for when I'm a grownup!"
Yes, it was very hard to keep a straight face! But I did inform her that she can wait until she's a grownup to "practice." :)