Sheldon: *singing in the tune of "Bingo Was His Name-o"* There was a scientist who had a theory, and James Clerk Maxwell was his name-o. J-A-M-E-S, C-L-E-R-K, space, M-A-X-W-E-L-L, and James Clerk Maxwell was his name-o. There was a scientist who had a theory, and James Clerk Maxwell was his name-o. *claps* A-M-E-S--
Leonard: Okay, okay, we get it.

Sheldon: Hey, would you like to hear some songs I've rewritten to get children interested in the hard sciences?
Howard: Sure.
Leonard: Really?
Howard: Yeah. I like music. I like science. I like making fun of Sheldon. Hit it!

Amy: Have a seat on the floor.
Sheldon: Not there. That's my spot.

Leonard: Okay, fine. Sheldon, may I please visit your fort?
Sheldon: I want to say no, but it's too glorious. Get in here!

Leonard: Well, you kids have fun. I'm going to go to sleep.
Sheldon: Leonard, don't you want to see the inside of the fort?
Leonard: Yeah, I'm good.
Sheldon: Oh, come on. I really wanted to tell someone they can't come in.

Sheldon: Do you need to borrow a toothbrush or pajamas?
Amy: Would it alarm you to know that I hid those things here two years ago just in case this ever came up?
Sheldon: It would, but you know how much I admire preparedness. How did you know we'd be in the living room?
Amy: Who says this is the only one I hid?

Sheldon: Very well. I will agree to a family-friendly, G-rated, boy/girl sleepover.
Amy: PG. Some scenes may be too intense for younger viewers.
Sheldon: G-rated with a warning for families with babies and toddlers.
Amy: You got yourself a sleepover.

Sheldon: Well, wait. What if, just this once, we suspend the date night parameters and you stay later?
Amy: Well, as long as we're suspending the parameters. I could stay really late and we could have our first sleepover.
Sheldon: That's a big step.
Amy: It's a big fort.

Amy: Oh, ten o'clock. Date night's over.
Sheldon: What? No. We haven't picked a winner.
Amy: We both know this one's gonna win.
Sheldon: Well, of course we do. Fort Knox doesn't have a secret physics lending library.

Amy: I'd say Knox over Ticonderoga 'cause it's got the gold, and McBlanket over Sumter 'cause it has a higher thread count.

Sheldon: Okay, so the final four forts in the first annual best fort ever contest, or "fort off," are Fort Knox, Fort Ticonderoga, Fort Sumter and... Fort Cozy McBlanket.

Josh: So, I have to ask, was the robot sexy?
Howard: It was actually just a mechanical hand.
Josh: 'Cause that's all you need, right?
Howard: You are my brother.

Penny: Okay, look, would it make you feel better if I did something dumb like sneak out of work one day to go audition for a Kevin Smith movie?
Leonard: That would be great, thank you!
Wil Wheaton: I'm just going to jump in here real quick. Leonard, a moment ago, you were dead set against Penny resuming her acting career, but now you're all for it. Is it fair to say that she played you like a violin?
Leonard: Yes, it is, Wil.

Penny: Leonard, why are you making such a big deal out of this? So our roles have changed a bit over the last couple of years. That's the way life is. And I'm sure, in time, they'll change again.
Leonard: Great. Not only are you more successful than me. Now you're more mature.

Leonard: Wil, I'm begging you. Please turn that off.
Wil Wheaton: Sure. *turns recording off* *turns recording on* And we're back.