After school Ron and Kim went to Bueno Nacho.

"So what's been with you lately Ron?" Kim asked as she began to eat her taco.

"What do you mean what's been with me?" Ron asked offensively.

"You just been well not yourself..." she explained.

"I'm fine..." Ron said. "Just don't worry about it..."

Rufus pops up on the table as he grabs a bottle of tabasco sauce and drenches Ron's taco in it, "YUM! NACO!" he squeals in delight as he's about to take a bite, when suddenly Ron takes the naco in his hands and begins to eat it slowly. The hungry mole rat growls hungrily at Ron who just continues to eat his naco quietly.

Kim shook her head knowing something was up with Ron that he wasn't telling her. Ron knew he could tell her anything, but this time was different. She felt Ron kicking her leg for some unknown reason she glared at him, "Ron!" Ron laughed as he wiggled back in fourth in his seat like he wasn't able to contain himself. Kim looked at him oddly, "Ron, are you alright?"

Ron looked at her with a crazed look on his face, "I have to go the bathroom!" he whined in a childlike voice.

Kim was annoyed, "Thanks for sharing..."

"I have to go now!" Ron cried.

"Then go!" Kim yelled.

"I can't go by myself!" Ron explained. "I'm not a big boy!"

Rufus looked at Ron funny. Kim sighed, "Ron, you are a big boy... you had a Bar Mitzvah a few years ago, you're fifteen for heaven sakes!"

Ron shook his head, "You're silly! I'm only five!"

"Five?" Kim was now annoyed. Maybe Ron wanted attention but there where better ways to get it. "Ron... how old are you?"

"Five!" Ron cried. "And I have to go pee really bad, Kimmie!"

"Ron, stop playing around and just go the restroom!" Kim shouted.

"Okay! But if I miss, it's your fault!" Ron stomped as he made his way into the men's room.

Kim picked up the kimunicator now a little freaked by Ron's actions. "Wade!"

"What did he do this time?" Wade sighed.

"Ron's acting really weird!" Kim explained.

Wade began to laugh, "Kim, Ron always acts weird! You know that!"

"Yeah, but he's acting weirder than usual," Kim gave Wade a look. "He's acting like a five year old."

She hears the toilet flush as Ron comes out relieved.

"Did you wash your hands?" Kim asked. Ron's eyes grew big as he stepped back into the restroom. Kim sighed, "See what I mean?"

"He's just doing it for attention..." Wade said. "Just ignore him..."

Ron came out Kim smiled, "Better now?"

Ron smiled as he took Kim's hand and began to swing it, "You're really pretty for a babysitter," he grinned.

"Ron stop it!" Kim took her hand back. "Just stop it!"

"What?" Ron cried.

"Acting like a five year old!" Kim screamed.

"But I am five!" Ron replied.

Kim stopped, Ron actually sounded serious. If he were playing around by now, he would of surely started to crack up by now, and he wasn't. He looked at her with his hazel brown eyes and gave her a puppy look.

"You're not playing around?" Kim asked.

"If I were older I'd say so!" Ron stomped his foot as he looked outside. "Kim can we start to head home, it's getting dark." he gently picked Rufus.

"Okay Ron," she said as the began to walk home together, Kim wondering what to tell his parents.

"Mommy!" Ron yelled as he jumped into his mothers arms.

"What? Goodness Ron..." Mrs. Stoppable said shocked.

"Kim took me to Bueno Nacho and we had tacos and had a lot of fun!" Ron explained.

Mrs. Stoppable looked at Kim. Kim just shook her head and smiled. "Well..." Mrs. Stoppable said trying to hold on to Ron. "We'll see you tomorrow Kim..." Mrs. Stoppable smiled.

Ron ran to Kim as he hugged her leg as she began to head out, "NO! Kim! Stay! PLEASE!" he cried as he hugged her leg tighter.

Mrs. Stoppable put her hands on her hips, "Ronald Dean Stoppable! What has gotten into you!"

Kim looked at Ron's pleading eyes as she gave in once again, "I'll stay until he goes to sleep..." she finally said.

Ron skipped around as he went to get ready for his eight o' clock bedtime.

Kim sighed, "Help..." she said under her breath.

A few minutes later Kim tucked Ron in for the night as he slowly went to sleep, Rufus sleeping next to him.

Kim quickly took Ron's drinking glass and went out the door.

"Got any DNA?" Wade grinned. "Like a kiss he gave you or something?..."

"Ha, ha, very funny..." Kim said as she sent him a sample from Ron's glass.

Wade took a few minutes as he observed the sample, "Uh-oh... this is bad..."

"What is it?" Kim asked.

"I really don't know how to explain it," Wade started. "But whatever it is, it's controlling Ron's mind to the aptitude a five year old's..."

That night Kim worried about how Ron was going to make it thorough high school with the mind of a five year old until they found a cure.

The next morning she walked to Ron's house, when she entered she found Ron eatting a bowl of frosted flakes. "Kim!" he said excitedly as he ran to Kim and hugged her tightly around the waste, it wouldn't of been so bad if Ron wasn't really fifteen. Ron grabbed his backpack as he kissed his mother goodbye.

"This is going to be along day..." Kim sighed as they walked towards the high school.