Jim stood there at the food court and thought a moment. He decided that he really wanted to try out the balloon on himself, but not here. He left the mall and rode his bike home. When he entered his house, he called out to see if anyone was around. No one answered. He was alone. Perfect, they must all be out at one of his sister’s soccer games or something.
Jim ran up to his room, shut the door and closed the drapes. Even in an empty house, he wanted to keep this as private as possible. He pulled out the balloon and considered what to try changing first. The old man in the shop had already played around with his height. Maybe Jim would just try a single body part. Briefly he considered growing his penis, but he decided that he didn’t want to mess with something as precious as that until he had some more practice with the balloon.
Jim remembered that the old man had grown him taller in the store before. He knew that that worked, and he liked the feeling before. Making up his mind, he said "Control my size" aloud and blew a breath into the balloon. He felt dizzy for a moment as his head shot up a few inches. Shaking his head, he blew again into the balloon. Now standing at 5 foot 8 inches, Jim was nearly as tall as he was in the store! Taking a deep breath, Jim blew once again into the balloon, standing at 6 feet tall.
Pinching the neck of the balloon closed, Jim examined his body. His shirt exposed several inches of his stomach, and his shorts were incredibly short on his new longer legs. However, as he had said size and not height this time, he looked fairly normally proportioned instead of skinny. The room felt smaller to him than it had previously. He was about to release the air but then a thought came to him - how far could he go?
Taking another deep breath, Jim blew into the balloon again. He felt dizzy as he shot up several inches to 6'4". The top of the doorway was just a few inches from his head. He was taller than his father! Looking in the mirror, his shirt was skin-tight on his new wider shouders, and his feet definitely looked larger than his shoes.
Even more curious, Jim blew another deep breath into the balloon. He heard a small rip as his shoulders widened again and his shirt began to tear. Now standing at 6 feet 9 inches, Jim couldn't fit entirely under his doorway anymore. His feet were now several sizes larger than his sneakers, and his shorts were thankfully elastic and hadn't torn yet, although they were definitely straining to hold on.
Purely for fun, Jim blew another breath into the balloon. His feet visibly lengthened along the carpet, his head shot up even more. Jim was past 7 feet tall now, standing at 7 feet 2 inches! His shirt had ripped even more and everything looked so small to him now! The balloon was almost full, so Jim said "release" and let all the air out.
Looking out, Jim felt like he was in a doll's room almost. Everything was tiny in comparison to him. He looked almost comical - a giant 12 year old. Jim marvelled at himself in the mirror - his legs took up more than half of the doorframe, everything about him was huge. What would he grow next?