A/N:This is a request for Boris Yetstin for I've been thinking that it could be a great Age Regression story that you'll could read.

Chapter 1:Youth Potion Experiment

It started when Arthur and DW had to go over to Brain's House as he gets to test on an experiment that'll get to make him though the millions.

"What are you working on?" asked Arthur. "I'm working on a youth potion that is going to reverse the aging process that it could make people younger."

"A youth potion?" asked Arthur. "Did you know that it was going to make it when they had to age, they wish they could be young again?"

"Indeed, that I Could be that quite do, and just to make it as they it so they did they get to show that it was that simply that had go though the fountain of youth within." said Brain.

"I Don't know about you but I think that it could be quite risky." worried Arthur.

"I got to warn you, it seems that could be quite risky that it could reduce down from a 78 to a sprite 22-year-old." Explained Brain.

"Well, that might get to explained it." Said Arthur.

As DW Double get to be seeing that potion. "Ooh! Juice!" as she gets to that potion as she get to touch it but Arthur Stop. "DW, stop!" as he grab her. "That's not Juice, that's Brain's youth potion."

"Is that to make you feel younger?" Asked DW. "It also make you younger too." as he put her down.

"I've been examining it as a senior gets to be reduced into a teenager so it could be quite interesting to make them healthier here." Just then, Buster and Francine came in. "We came here for the youth potion that Brain's been working on." she said.

"Yes, and it could be that it was going to be that it could be that it was going to be that simply had to make it when they get a dose of it." explained Brain.

"Imagine if our parents could be this young." said Buster. "Yeah, they could be playing with us all day long." said Francine. "And that didn't work, aliens could fly down into a space ship and do that."

"Buster, what does aliens got to do with Alan's youth potion?" asked Arthur.

"Nothing, I just want to point that out." as Buster smiles. "Wanna hear some good jokes?" As Arthur gets up to the youth potion, he gets to see of what it'll taste like. "Wait Arthur! No! It's still untested!" But it was too late, he took a taste at it when he noticed that he notice that it was quite refreshing.

"This is great." said Arthur. "No wonder that I feel younger already."

"That youth potion needed to be test first!" exclaimed Brain.

"Oh, I feel a little strange here." as Arthur began to worry. "The Effects didn't happen yet, he notice that he was simply had to feel that he was about to see that it was going to show that he was going to be that he was simply that was he was going to make it when as they see that he was simply had to notice that Arthur was begin to feel funny.

As he went to a mirror, he was still himself, he knew that youth potion had taken no effect but he notice that he was going to feel strangeness.

As he gets down to 7, he felt that he was starting to get a little younger as he gets to show that he was simply that he was growing younger. "I'm beginning to get younger!" as he felt his bones that he was going to be that he was going to make it when he noticed that he was going to feel this clothes is beginning to get bigger and baggier.

As he goes down to 6, he gets smaller as well as younger, as DW saw with her two eyes.

As he felt about it, his glasses was shrinking with him as he goes down to 5, as he notice that was going to make when he notice that was simply had to feel younger, as he goes down to 4, DW's Age as he felt that he was going to make it when he gets to show that he can't stay that age as he finishes his transformation as he's now a 3-year-old in undersized 8-year-old clothes.

"Brain!" he shouted in a high-pitched voice. "I feel like that I'm going back to preschool!"

As DW Smile. "Really? I got my little brother!" said DW. "Wait, if I get to show this to my mommy and daddy, they won't believe me if I told them of what happen." as she gets to take a drink of that potion too.

"Ooh, that drink was cold." as she noticed that she was going to feel that she was going to feel that she was feeling funny as she giggled as she felt that she was going to feel that she gets down to 3, she was simply had to be funny that her clothes got a little bigger, and then she goes down to 2 as she lost her trail of words to baby babble as she goes down to a 1-year-old girl in undersized 4-year-old clothing.

"I Thought it had to be simply to be tested but it seems that Arthur and DW's the first two, well, I guess that settles that." replied Buster.

"Gee, I'm a baby again!" said DW in a high pitched voice. "This is great!"

"Great, not only that I got twin sisters but I think that we might be in a lot of trouble." said Arthur. "No Arthur," said Francine. "Brain's youth potion has made you 5 years younger, and your sister got 3 years younger."

"Oh." and then Arthur cried for 5 Seconds.

"If I know anything better, I would see that it could be that quite they got a lot of babysitting to do."

As they look into their newly regressed ages, they get to see that Arthur slowly got to touch the reflection, he noticed that he was simply younger. "Yikes, I got turn into a 3-year-old again!"

"Well, I guess that Brain's youth potion's a complete success." said Francine. "Yes, but not in a way that I wanted to started out with."

"I can't wait to show this to Kate!" Said DW. "She'll get to see this more importantly to be that we get to be twin sisters!"

"Not exactly, for you see, that potion is only simply limited." explained The Brain.

"Limited?" said Arthur. "Yeah, for you see, I believe that potion will have to wear off within a week."

"At least things might get easier for me again." said Arthur.

"Come on guys," as Francine gets to picked them up. "I think that I'll take them to their parents."

"But we just here!" said Arthur.

As she took them back to their parents, but how will they reenact?

Find out next chapter and leave some comments down below.