I second the frozen stuff! Also, I have a little mesh sack that I put chunks of ice (water or juice) into and let mine chew on that--good in summer and good for teething.
I would also like to add that maybe if your children are monsters at an early age, they'll become nicer later on *cross fingers*. Mine was great for four years--I really thought I had the perfect child--and then it's all kinda gone to hell lately.
Good luck with the teething!