Today I became "that mum has a child that bites" at our pre-kindy session. He has bitten his older brother before in frustration, so I can only assume that he was frustrated with the other child (it happened when I was looking in my bag for something- ofcourse!) He knows its wrong, I waited till he came out of the playhouse, picked him up and said "we're going home now because you bit that child..." When we got home I asked him is it ok to bite? he shook his head- so he knows. But it wont stop it. I dont think there is a magic solution to this 1, just hope its a phase, watch carefully and warn other parents/ teachers etc