Jim wondered if the balloon could affect other people besides him.
He crept downstairs, into the living room, and saw Ron, his 45-year old dad, sitting on the couch, half asleep. He was a 7'9 man with ginger hair, and a big bushy beard, blue eyes, and he was wearing brown shoes and blue socks, as well as black slacks, and a white shirt in a green tank top.
He wondered if he could change his dad's with the balloon.
He could change Ron's size.
So that his dad didn't see or hear him, he went upstairs into his room.
"Control my dad's size," Jim whispered.
He then took a deep breath, blew into the balloon and it expanded with a “FFOOOOOFFF” and the sound of stretching rubber. At the same time, Ron seemed to grow taller, and his clothes seemed to get tighter on his body.
Ron stared at his tighter clothes. His white shirt in a green tank top no longer covers his torso.
Jim blew into the balloon again. It expanded with a FFOOOOOOOOOFFF.
RON stared as he saw himself getting bigger than ever, more than his usual height.
His toes were beginning to get cramped in his shoes.
Ron staggered into the back yard, hoping for a bit of fresh air.