How about a penguin?... Yes, he's even a good penguin.
10 seconds sound clip from the A Charlie Brown Christmas movie soundboard.
You can hear this line at 00:11:08 in the Blu-ray version of the movie.
Quote context
[...]
- Every Christmas it's the same. I always end up playing a shepherd.
- Snoopy, you'll have to be all the animals in our play.
- Baa.
- Moo.
- How about a penguin?... Yes, he's even a good penguin.
- Waaah.
- All right, all right, script girl, continue with the scripts.
[...]