Like the summary said, this is a reply to the Challenge of moon_shadows, ‘A lil’ mistake’. This were the rules:

1. Lily and James must be in 7th year.

2. L/J must be Head Girl and Head Boy and have her/his own dorm room.

3. L/J must be around the ages of 3 and 4 when she/he gets transformed.

4. L/J, as a child, can't remember anything past her/his age (3 or 4).

5. L/J must have known each other and been good friends before the age of 3 and through the age of 4, at least.

6. Please, don't start writing about other ships, besides L/J; they are irrelevant to this challenge.

7. It must end in a L/J pairing.

I hope you’ll enjoy.

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You’re Such A Baby!

Chapter 1: OOPS!

”Can’t he just grow up!” Lily raged as she stormed out of the Common Room, with a simple spell charming her hair back to its normal state. “I can’t believe Professor Dumbledore made him Head Boy!”

“Evans! Wait!” James called after her, but she ignored him, raging on.

CLANG!!

Lily grumbled as she just found out that banging into a suit of armour that was situated just around the corner was just as painfull as banging into another persons head.

“Here, let me help you.” Hallie, Lily’s best friend since first year, said, extending her hand to Lily. She had obviously followed Lily out of the portrait hole.

“Thanks.” Lily said.

“So, what has he done now?” Hallie questioned as the two friends continued down the hall, while the harness picked itself up from the ground.

“The bloody git turned my hair blue! Blue!” Although Lily was shorter than Hallie, the latter almost had to run to keep up with her redhaired friend.

“Well I’m sure he didn’t mean to turn your hair blue!” Hallie tried to calm Lily.

“Oh, I’m sure he didn’t, but that’s not the point! He’s the bloody Head Boy, for Merlins sake! You’d think he would behave himself...”

“So what did you do, take off house-points?”

“No.” Lily said, slowing down now they had reached the Great Hall. “We’ll probably need all the points we can get to beat Slytherin, and if I would give him detention he wouldn’t even mind! No, I’m gonna make him pay – my way!”

They sat down for breakfast, and as more students filled in the Great Hall, schedules were handed out, since this would be the first schoolday of the year.

“Excelent...” Lily said, looking at the schedule over her toast. “We’ve got Charms first. That’s the best time for my plan.”

“What are you going to do then?” Hallie asked.

“Wait and see.”

Half an hour later, the students that took NEWT-Charms, including Lily, Hallie, James, Sirius and Remus, took seats in the classroom.

Lily made sure she was seated behind James and his friends and the lesson started.

After taking some notes, professor Flitwick instructed them to review some of last years charms and he walked through the classroom to help some of the students.

Lily waited untill James was in one of his discussions with Sirius.

“Redu – hey!” Midsentence, Lily was pushed by some Slytherin and her spell hit James square in the back. It had been her intention to shrink James’ clothes so he would be trapped in them, but now she wasn’t sure what was about to happen.

Lily watched in horror as James collapsed to the ground. He yelled and seemed to be in incredible pain. At first nothing seemed to be happening, but then, James glowed a bright gold. It got brighter and brighter, untill the class had to look away.

The yelling stopped and with a flash, the light was gone.

Sirius was the first to aproach the wailing James.

As the class edged closer, Lily decided she had enough courage to take a look at what she caused. And she was shocked to see that instead of the normal 6 feet tall James, there sat a little James that, if he should have been standing, he wouldn’t be much more than 3’3”, 3’4” at most.

Lily hoped with all she had that the change was only in his body, and not his mind.

“James?” Sirius asked the toddler.

James looked up at Sirius, blinked, and started wailing with all his might.

Without thinking, Lily aproached the toddler and shrank his clothes so they would fit him again.

She then picked him up and rocked him while muttering soothing words. Slowly, the wailing subsided and James looked up at Lily with big, wet, hazel eyes.

Professor Flitwick made his way through the wall of students and looked at toddler James.

“Oh my...” He said. “Well, miss Evans. I think you should take mr Potter there to the hospital wing.”

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Well, there you have it. My first chapter as a Portkey author! Please tell me what you think.

I know its a bit short, but the chapters become longer, promise.