I've been looking at stuff on biting and it seems to suggest that you let the dog bite but teach it to moderate its bite following a set method.
I have to say I find this scary. He is a big pup and has bloody big teeth already. I don't want him to bite me so that I yelp to show him he shouldn't bite me and I certainly don't want to train that with the kids.
We have been offering an alternative chew toy.
Do you seriously have to go through getting bitten?