I got this idea from The Primary Pages!
There is a hole in Eddie's mouth... I put a bowl of "spaghetti" (twine) in front of Eddie and string the twine through his mouth. When the kids sing really well, Eddie eats the spaghetti fast, when they don't sing as well as they can, Eddie eats slowly.
I pulled this out a second time, and the
kids kept whispering, "It's the noodle guy! Yeah!"