They have this little toy, it's like a bunch of different plush animals and they each make their unique sound, every dog I've given them to has LOVED them.
Also everyone seems to love the Good Cuz/Bad Cuz toys.
Okay:
http://www.dog.com/itemdy00.asp?T1=311004+FIS and
http://www.dog.com/itemdy00.asp?T1=311111+SM