"Welll," Jim said, "maybe I could make you younger, roughly around my age."
"OK." Ron said.
Jim blew up the balloon again, and then said, "control my dad's age."
Then, he let air seep out of the balloon.
Ron felt as though he were gradually sitting down, as everything around him was rising higher. Then, he noticed his clothes started to feel looser on him. Looking at his reflection, he could see his face shrinking, and his beard was starting to recede into his face. Jim stopped letting air out to examine himself.
He was what he guessed to be approximately 40 years old.
In spite of that, he decided to keep going. He wanted to see what his dad looked like when he was even younger.
Jim let out more air, and again Ron felt that strange shrinking sensation. Staring at his reflection, he watched as he grew smaller and more younger. To approximately 30 years old.
Another air seepage.
Ron regressed to 20 years old, and his beard was even smaller.
Jim let more air out, and Ron regressed till he was 12 years old, Jim's age.
Ron noticed how young he looked. He had no beard anymore, and his clothes were way too big for him. Ron stripped off his huge clothing. He looked at his little nude body.