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...
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.”
He wanted more.
FOOOOOOOOOOOFFFFFFFFF.
Again, he felt himself shoot upwards as the balloon expanded.
Jim seemed to be getting older.