Jack Benny 410406 (around Easter)

The Quiz Kids are on the show and they'll be doing a quiz, teamed against "The Jello Kids".

Jack is introducing everyone to the audience.

JB: How old are you, Dennis?

DD: I'll be one in December!

(audience laughs)

JB: You'll be one?

DD: Yes, my mother is raffling me off.

(audience laughs, then applauds)

****

I have a vague idea what might have made this joke special-enough that the audience applauded, but I'm not sure.

What do you think the joke is about?