Styrofoam Balls

I have some Styrofoam balls and want to make eye balls for an outside display …Any ideas on how to display?

I guess I should say its for Halloween

Yes, paint white and then paint a small blue circle and a smaller black one on top like this one http://www.hkvisioncare.com/main.htm
to make the eyeballs.
Then thread red string or wool soaked in jelly or vaseline through the balls and hang from tree branches or from the door frame.
It will look really scary….aaargh

Polystyrene Balls