Well, if he couldn't wish himself back to normal, could he at least wish to change something about Mrs. Claus' body? He hoped so. He'd still have to explain all of this to his mom, but at least he wouldn't be an old fat woman.
"I wish I was a teenager," Jon said, holding the stone, which glowed a moment later, granting his wish.
After the stone flashed, Jon looked at himself in the mirror and saw that it had worked! He was no longer a fat old woman. Instead, he was a fat young woman. Okay, that worked. Maybe he could wish away his weight problem too?
His mom knocked on the door again, more impatiently. "Jon, open this door this instant."