Quote from the episode A Computer, a Plastic Pony, and a Case of Beer
Sheldon: Sorry, Dave. We're living paycheck to paycheck.
Quote from the episode A High-Pitched Buzz and Training Wheels
Sheldon: Oh, there it is! [waving to the truck] Over here! Over here! This is exciting.
George Jr.: It's somethin'.
Sheldon: [waving to the truck] Thank you! Have a great day!
Quote from the episode Teenager Soup and a Little Ball of Fib
Sheldon: [coughs] I don't feel well.
Mary: What's wrong, baby?
Sheldon: I don't know. I just feel awful.
Mary: Well, there is something going around. Billy Sparks got some kind of bug.
Sheldon: That is consistent with what I said. Good. [weak cough]
Mary: You're staying home today. I'll go make you some tea.