Tori,
I second the literature that PeggySue recommends but I also underscore her suggestion that the boys should actually take their new dog to a good basic obedience class (other than the PetSmart/PetCo variety). The good classes will help with puppy/dog socialization as well as teach both the dog and the owners how to establish the proper relationship.

Dogs usually think of children as part of their pack rather than their leaders. It's important to change that perception in a structured way where both the children and the dog understand their roles.

Training isn't as much about teaching the dog proper behaviors; it's about teaching the owners how to give proper direction and appropriate rewards and corrections.

Congratulations and good luck.

Jim