What to do about a grumpy little sister

Here's our recent dilemma...

Gemma gets pretty testy with her well intentioned (well, most of the time) brother. For instance, this morning Zane was trying to take something from Gemma that she was not supposed to have. He went over to her and grabbed it from her. She screamed at him and tried to pinch his arm. Zane in turn looked at his Dad, in dismay, like, I'm just trying to help?!

So, Dad and I offer up some advice...

Bryce says, "Zane, thank you for trying to help, but let Mommy or Daddy take things away from her. If it's an emergency, tell her 'no no, Gemma' (this is what we say to her) and gently take the item away."

I say, "or Zane, offer her a toy in exchange for the item you are taking from her, and then she won't get so mad, because you're giving her something else to play with."

Zane stops to contemplate all of the given options.

He then very seriously says, "or we could just put her outside."

Laughter ensues. Admittedly, I have thought of this option. However, this is not very realistic. So, I think we'll keep working on this one. :-)