"It's a wishing stone," Jon said.
"Get outta here. No way," Sally replied.
"No really. Watch," Jon said. He grasped the stone and said "I wish I had a cheeseburger." The stone glowed, causing them both to look away. And when they looked back, Jon was holding a cheeseburger in his other hand.
"It's a trick," Sally said.
"No, believe me. It's not," Jon said. "All you have to do is ... hey!" Jon yelled, as Sally snatched the stone out of his hand.
"If you're going to wish for something, it should be something bigger than a cheeseburger."
Jon's eyes went wide. Sure, Sally would probably change back to normal once his mom and aunt got back, but any wishes that were made until then couldn't be reversed. And before he could do anything, Sally made a wish.
"I wish ..."