"Look at that." Kellie pointed out a fun little ride. The train was one of those made from children to ride around a couple of times. While adults could fit in few small cars, they were mainly for small children. Two seats facing each other were in each car, though it appeared as though they were going through a quiet moment, with only a few children and adults getting on.
"Ticket." A six year old girl was giving out paper tickets to each rider. The young latina girl was wearing what looked like a childish conductor outfit and who looked like her twin sister wearing the same outfit was showing adults and children to the cars.
Lisa was giving Karen as the brown haired teen was giving her a grin. "Fine, I'll go first. But you're going to join me in toddlerhood soon, won't you?" The redhead gave her friend a long suffering look that was mostly faked.
"Yes, I'll go as soon as possible." With that Lisa was led by the ticket girl who was named Penny to the last open car and let in. She had squeeze in a bit with the seat but it wasn't too bad.
"And here you go ma'am." Lisa turned just in time to see Karen step up to the same car. With some effort, the two teens squeezed themselves into the car meant for two children as Penny closed the door. Lisa notice that both were well into their personal space from their efforts.
Karen grinned and leaned in a bit, "You did tell me as soon as possible. Besides, this car won't be that crowded for long."
Lisa noticed something about Karen. "You're not wearing your glasses?"
Karen nodded. "I got them when I was ten. I gave them to Kellie so I don't lose them."
Karen looked to see Penny's twin sister Sandra get on the last car into an adult seat. Lisa looked forward to see Penny seat herself in the front car (also an adult seat) before pulling a level. With a cheerful 'toot' the train started to move and a cheeful tune they recognized started to play.
Both teens felt a slight tingle as the train started to move. As the first lap started, both Lisa and Karen didn't notice anything at first. Then they saw their friend's face look a little younger. As sixteen turned to fifteen, both girls felt their clothes loosen.
The train started to speed up and the years started to drop. Halfway around the first round, both girls shifted as their clothes became very loose. They could see the other was starting to get smaller in height and womanhood.
Kellie and other others saw the train go by the first lap and saw that both girls were now 13. Their clothes were very large on them and they were seating back more as their seats seemed larger.
"This is fun." Lisa looked at her brown haired friend as they were rapidly going in puberty in the other direction. Karen nodded as the second lap was halfway done.
At ten, both girls at left puberty behind. Karen blinked as the world slowly came into focus as her need for glasses became something to worry about in the future.
Both girls started to sing the cheerful tune as they entered the single digits of life. They didn't care about future problems and were simply enjoying the now.
Another lap and both girls noted their feet were starting to no longer touch the bottom of the car. The seat was quite roomy for the seven . . .nope six year olds.
One more lap. Karen and Lisa quickly went from just entering kindergarten to fortunately being on the right side of needing diapers. The pair of three year olds continued to sing happily as they finished the final lap. They waited for the door to open.
A tall busty Latina in her late teens wearing a conductor's outfit with short skirt helped them out of the car (it was a good step for three year olds). At the same time her identical twin sister helped with picking up lost clothing to give to older friends or family (or simply leave in pickup for later).
Penelope held both Lisa and Karen's hands and led them to their friends.