The stroller suddenly turned towards a house after what felt like an hour of rattling down a sidewalk. Jim did not recognize the house.
"Who lives here?"
"You'll see," Judy said.
Judy stopped the stroller at the front door and rang the doorbell. A minute later a teenage girl opened the door. Jim felt that she looked familiar, but he couldn't remember where he had seen her before.
"Yes?" said the girl. "Can I help you?"
"You can," said Judy. She pulled out the balloon and started blowing in it.
The girl appeared confused. "What is this?"
Judy stopped inflating the balloon. "This," she announced, "is magic."
"What?"
"Control Ellen's age." The balloon started to deflate.
"Hey, how did you know my...?" Ellen started to say, but stopped when she realized that she was shrinking. "What's happening to me?" she squeaked as her clothes became looser on her. When her jeans slipped off her narrow waist, she gasped. She stooped to pull them up, but ended up on her ass on the tile floor behind her. A second or two later she was a baby. Her confused looking head poked out of her T-shirt which covered her like a dress. The outline of an empty bra stood out clearly under the shirt.
Judy just opened the screen door and picked up Ellen and her clothes and moved them to the side. Then, Judy pushed the stroller in the house. Ellen just sat on the floor, looking dumbfounded. Jim could sympathize. Ellen had it even worse than he did.
"Amy?" Judy called. "Are you here?"
A freckle-faced 9-year-old girl ran downstairs. Jim immediately recognized her as Judy's friend Amy. The girl had been over to their house many times. That's probably where Jim saw her big (well, formerly big) sister, Ellen, before.
Amy paused on the stairs when she saw the three of them by the door. "Who are you?"
"It's Judy." Judy posed, showing off her big breasts. "You like?"
Amy was unconvinced. "Ellen?" she called. "Someone's in the house."
The baby on the floor babbled desperately but seemed unable to form words with her young mouth.
Judy picked up the baby and said, "Here's Ellen."
Amy looked scared. "You keep away from me."
Judy sighed. "Fine," she said. She put down the baby and pulled out the balloon. "Let me show you. Watch the baby."
A few quick breaths and the baby had become a young girl. "Amy," it cried. "Help me! It's me, Ellen. This woman shrank me into a baby!" The balloon deflated and Ellen moaned, "Nooooo!" as her voice comically rose in pitch while she became a baby again.
"You see," said Judy. "I have magic balloon. I'm Judy, just older."
Amy squinted. "You do look like Judy." She smiled, convinced at last. "Wow, that's cool!" Amy ran down the steps and stood looking up at her friend. "Man, you're huge."
Judy smiled. "Thank you. Hey, are your parents still going to be out for the whole night?"
"Yeah, Ellen was supposed to babysit." Amy laughed. "I guess we're babysitting her now."
The two of them laughed as Ellen started to cry quietly. Amy noticed the stroller. "Who's the other baby?"
Judy smiled. "Introduce yourself, Honey."
Jim crossed his arms and looked away from them. "It's Jim," he muttered
"Don't you mean 'Jamie?'" said Judy, correcting him.
"Jim?" said Amy in amazement. "Oh my God! That's your brother?"
Judy nodded, and Amy laughed. "Oh that's too funny! Look at the little dress he has on. I mean 'she' has on."
Judy closed the door and asked Amy, "How about we call up Betty and Cathy and have a little fun?"
Amy smiled and pulled out her phone. "I'm on it."
***
Betty and Cathy rode up on bikes a little while later. They only needed a quick demonstration on baby Ellen to convince them of the magic that Judy controlled.
"That's so cool," said an awed Betty. She was the shortest of the group and had unruly dark hair.
"Where'd you get it?" asked Cathy. Cathy was a cute blonde girl, who Jim was sure would grow into a hot woman someday.
"Jim bought it," said Amy, the redhead, retelling the story she had heard from Judy. "Jim was playing with his age and lost it. Then, Judy got it."
They all laughed at him and cooed at the cute little toddler he had become.
"So," said Judy. "I have an idea." The girls listened intently. Judy commanded natural authority in the room by being the oldest one, in body at least. Ellen, Amy's formerly older but now baby sister, was sleeping soundly on a bed upstairs. "I think we should all grow up, first of all." A glimmer of hope appeared on Jim's face. "...except Jim, of course." They all laughed at him as he frowned.
"Let's do it!" said Amy as she jumped up in front of Judy. "Hit me."
"Wait," said Judy. "You have to strip. This thing doesn't grow your clothes."
The three girls giggled nervously as they undressed.
"Feels like I'm going swimming," said Cathy as she pulled down her jeans.
"Hey," said Amy. "That gives me an idea." She ran upstairs, stark naked, and returned a minute later to her naked friends holding a small pile of bathing suits. "They're Ellen's. They might fit us when we're older." She dropped the suits on the couch.
"Good thinking!" said Betty with forced enthusiasm. She seemed the most uncomfortable of the three about being naked.
"Okay," said Judy as she held up the balloon. "You guys ready?"
"Yeah," they replied and lined up next to each other in front of Judy.
"Control the ages of my friends here." She blew in the balloon. FOOOOFFF. The three girls sprouted a few inches and giggled.
"That felt so funny," said Amy.
"Oh, look at me," said Cathy. Her chest now displayed a pair of nascent breasts.
"Cool," said Betty, who was still shorter than the others.
"Again, again!" cried Cathy.
FOOOOOOOOFFFFF. Another few inches of growth. Cathy shot up several more inches than the others as puberty hit her early.
"Yes!" Cathy cried in a slightly deeper voice and jumped for joy at the sight of her pubescent curves. Her young breasts bounced slightly when she landed. "Oh, look at my ass." Jim looked. It was getting big and round.
Amy cupped the lumps that had started to appear on her own chest. "I love this!"
Betty was still short and flat, but her face was looking a bit more mature.
FOOOOOOOOOOOFFFFF. All three blasted through a sudden growth spurt, leaving them all over 5 feet tall. They were clearly teenagers now. All of them displayed the signs of puberty now. Even Betty had grown a modest pair of breasts on her slight frame.
"Oh, yes," Cathy moaned in her teenaged voice. Her hands ran up and down her curvaceous hips and over her orange-sized breasts. "I am so hot!" Jim couldn't argue with that. If he still had a dick, he would be hard as a rock now.
"Nice," said Amy, whose breasts were just as large, though she had fallen behind in height by a couple of inches. Her crotch sported a brilliant orange bush of pubes.
Betty had only a decent pair of what looked like A-cups now. She was still the shortest and still a bit plainer than the other girls.
"Again!" Amy cried.
FOOOOOOOOOOOOOOFFFF. The girls became young women. Their curves filled out fully. Amy and Cathy grew a few more inches. Betty, sadly, did not.
Cathy just grinned down at her C-cup breasts, and stretched her hands over her head toward the high, vaulted ceiling above, enjoying her tallness and sticking her chest out as far as she could.
Amy just started laughing as she hefted her own C-cups. "Beautiful."
Betty ignored her own plain body and looked at the other girls' knock out bodies. "You guys look great." Betty picked out a bikini bathing suit from the pile on the couch and quickly covered her nipples and crotch. The other girls were in no rush to hide what they had just grown.
Amy looked at Cathy's ass and said, "Um, Cathy, can I just..." she reached a hand out.
"Go for it," said Cathy sticking out her amazingly round backside.
Amy ran a hand over one smooth cheek. "Wow."
Betty walked up to the two of them and held out a bathing suit to each of them. "Here you go."
"Oh," said Amy. "Duh. I almost forgot." Amy started to suit up in a pink one piece. Cathy lingered on her naked figure a bit longer before finally tying on a string bikini.
"What now?" said Cathy. "I want to go to the beach."
"Oh, yes," said Amy. "We should."
"It's too late to do that today," said Betty. "The sun's going down soon."
"I want to do something," said Amy, whining like a little girl with her grown up voice. "It would be too boring to just sit around with a body like this."
"I have one idea," said Judy. The other three were startled to hear her speak. They had all been so preoccupied with their own changes that they had forgotten that Judy was even there.
"What is it?" asked Amy, sounding intrigued.
"I thought that we could..."