Jon grabbed the stone hastily and blurted out, "I wish I was older!"
The stone flashed again, and Jon found himself back in the bedroom and the body he was familiar with... no, wait... it was even older!
Jon ran to his mirror and looked at his reflection. He was an adult now, and looked middle-aged. His hairline was receeding and he was unshaven. A middle-aged vrigin who still lived with his mom!