Sheldon Lee Cooper walked toward the usual table in the cafeteria. Leonard Leaky Hofstadter and Rajesh Koothropalli sat at the table, both eating their lunch. "Morning." Leonard greeted as Sheldon sat down.

Sheldon paused and looked at Leonard. "That's interesting." He sat down.

"How so?"

"Well…"

"Never mind…"

"Seeing that it isn't 11:59, and it is… 12:01, it is not morning, it is afternoon, so you should say 'Afternoon' instead of morning." Sheldon explained.

"Hey." Howard Joel Wolowitz greeted as he sat down with the others.

"See, that's an appropriate greeting." Sheldon said.

Leonard rolled her eyes. A boy, about 14, came over to their table with President Seabert. "Good morning-"

"Not morning." Sheldon protested.

"Don't care."

"Sorry." Sheldon looked down, ashamed.

"This is David, he is a graduate student. I would like you to take him for a tour, Leonard." Seabert said.

"Why me?"

"Because, you're the only one I like of you four." Seabert said.

"Thank you." Leonard smiled.

"I don't like you either." Sheldon chided. He left.

TBBT

Leonard and David were walking down the hall. "So, how old are you?" Leonard asked.

"Thirteen." David said.

"Oh really? You're young. Congrats. Where are you from?"

"Nebraska, really great, accept that most people grew pot."

"Oh really? My girlfriend's from Nebraska."

"Yeah? I learned how to drive when I was about 10."

"So, tell me a bit about yourself."

"Well, I crashed a snowmobile into a tree, and a four-wheeler into my brother. I'm the youngest of four, one older brother and two sisters."

"Really? Well. That's the University, and this is your office." Leonard motioned toward a door.

"Thanks. I'll see you around." David went into his office. Sheldon came up from the corner.

"Leonard." Sheldon tapped his roommate on the shoulder.

"Oh what the hell!" Leonard jumped.

"What's with this kid?" Sheldon asked.

"Nothing."

"How old is he?"

"He's only thirteen."

"And?"

"And what?"

"Does he seem smarter than me?"

Leonard sighed and walked away. David came out of his office. "I don't like you." Sheldon said.

"Okay. Bye." David left.

TBBT

Leonard got home as his girlfriend, Penny was getting her mail. "Oh, hey Penny."

"Hi." Penny said. The two started walking up the stairs. "So what's up?"

"Oh, nothing. We got a new scientist at the office. He's like thirteen, just moved from Nebraska."

"Seriously? That's my brother."

"Really?"

"Yeah, David, he's upstairs in my apartment."

"Wait… your thirteen year old brother is staying with you? So no happy-bouncy-fun-time?" "Gross!" David shouted.

"Whoa, David, what the hell are you doing here?" Penny asked. "Why aren't you in your apartment?"

"I'm trying to make blueprints for turning this elevator into a missile silo."

"Why?" Penny started shaking her head.

"We need to launch a preemptive strike on Burbank."

"Oh my God, it's a mini-Sheldon."

"Come on, give me this." Penny yanked the blueprints out of her brother's hands. "let's get up to the apartment." The three started walking and Penny crumpled up the blueprints. "You need to quit with trying to kill people."

"What am I supposed to do? You took away my gun!"

"You shot our sister!"

"I was second-hand high!"

THE END!
That is it for this story, it is just supposed to introduce Penny's brother. He may appear in another TBBT Fanfic of mine, so keep your eyes out