One of the reasons kids need parents nearby...
Generally this (the really intense biting) is more pronounced in kids who are not very verbal... they're trying to communicate and when they get frustrated they're as likely to use their mouths to do it, but since they can't talk it comes out as screaming, crying and biting.
The best way I know of dealing with this is to forget the silly advice about 'kids need kids their own age' which is pure b.s. to begin with... but to keep him with kids who are older --enough older to be able to anticipate his biting, and smart enough to be able to put a finger on his forehead and gently but firmly push his head away.
Whenever there are younger kids around him, the adult in charge needs to understand that the first priority is the safety of other kids, and your kid's self-esteem, and be close enough to him at all times to stop him from getting frustrated enough or close enough to bite.
at 3:13 AM on Sep. 10, 2010