He is 10 weeks old and is a sweet little chap, but whenever the children play with him they wind him into a frenzy and he growls and bites them 
He doesn't do it to me, he seems quite submissive to me and I think that is because I have been strict from the start.
No matter how often I tell them to play fetch games and STOP when he starts to get manic, the puppy ends up growling, snarling and biting. The vet said it is normal puppy behaviour but I am worried he is going to end up being aggressive 