2 or more Furbys

That's it! That's all you need!

Now for the steps:

Make sure the Furbys are all awake.
Place the Furbys within 4 feet of each other
Make sure the Furbys are facing each other
Make one of them talk
Let them get to know each other
PRESTO! The perfect recipe! Pretty soon, they'll be chatting away! No stopping them now!

Now is when you will hear some new things you never heard before! Here's an example conversation:
Furby 1: Here, kitty kitty kitty! Hide.
Furby 2: Yeah hide.
*short pause*
Furby 2: Here, kitty kitty kitty! Hide.
Furby 1:Yeah hide.
*short pause*
Furby 1: Na na na na na na Hide
Furby 2: Yeah hide.

This conversation may go on forever! But here's another cute conversation:
Furby 1: Listen me sing (sings Twinkle Twinkle Little Star) You sing
Furby 2: Ok. (sings Twinkle Twinkle Little Star) You sing

This conversation could go on, and on, until:
Furby 1: *Yawn Yawn* ok *Yawn Yawn*
Furby 2: *Yawn Yawn* ok *Yawn Yawn*
Furby 1: Me sleep
Furby 2: Me sleep

Then the Furbys will both fall asleep. Goodnight, Furbys!