C.S.
What are you going to do? Sue a 2-year-old for biting, or the daycare worker for not running across the room fast enough to stop him?
That's ridiculous. You don't sue for something that happens all the time among kids. Yes, it's unfortunate your child got hurt, but your reaction is way out of line.
Your daycare center probably has a policy about biters. The one daycare I know of sends the biter home immediately, and if he or she bites again, is asked to leave the center for a few months or until the biting habit stops.