"I wish --" started Sarah.
"No! Wait!" blurted out Jon, "I have an idea."
"This better be good," said the tiny woman, "Or I've got a few ideas of my own."
"Wish for something that we can use to change our sizes," said Jon, "Like a shrink-ray. That shouldn't negate the wish."
"Wish for a shrink ray?" glared Sarah, "That's seriously nerdy."
"Just give it a try," sighed the larger twin.
Sarah clutched the rock in her palm.
"I wish we had a shrink ray," she said.
Suddenly, there it was, sitting right next to them. A handheld pistol like device with all manner of buttons and settings. Jon, who realistically was the only one who could come close to handling the device, made a grab for it.
"Don't try anything funny," said Sarah, "Remember who has the rock."