As fun as it was to see himself as a little kid again, Jim really wanted to find out what he would look like when he was a grown up.
He put the balloon to his lips and started blowing deep breaths into it. FOOOOOOOOOOFFF... FFOOOOOOOFFFF...
In the mirror, he could see his body growing older again. His naked legs stretched out and thickened as his face became more mature and less rounded. Soon, he was back to his normal age of 12. He paused briefly to catch his breath and to get reacquainted with his regular body again before growing older.
Jim smiled and said to his familiar reflection, “Here goes nothing.”
He took a deep breath and exhaled it into the balloon. FFOOOOOOOOOOOFFFF. His height shot up suddenly and his shoulders broadened as has he rapidly passed through puberty. That breath had made him two years older. He guessed he had become almost half a foot taller with that last growth spurt.
“Cool,” he said in a deeper teenaged voice. “Looks like I finally get to be more than a shrimp.”
His T-shirt was now stretched tight over his torso, showing off the first signs of muscle growth beneath it. Looking down, he could see that his formerly bare crotch and legs were getting hairy and his member was looking much larger.
He wanted more.
FOOOOOOOOOOOFFFFFFFFF.
Again, he felt himself shoot upwards as the balloon expanded, though not as much this time. Looking at his face in the mirror, Jim hardly recognized himself. He looked more like a man than a boy now. His face even showed signs of stubble. Jim guessed he was in his later teens, an upper classman in high school. The T-shirt he wore felt painted on to his expanded torso and thickened arms. Again, he checked out his crotch to see that it had become a real monster. He smiled.
“Hey, Big Guy, looking good,” he said in a manly voice. Admiring himself in the mirror, he stared striking bodybuilder poses in order to check out his new muscles. He could only imagine what the kids at school would think if they could see him now. He guessed he was almost 6 feet tall. They would sure think twice about picking on him, seeing as he could bench press even the biggest of the bullies. But then, suddenly, as he was flexing...