This isn't really innovative, but it is something I like. I hook my dog to a harness, and attach 15-20lbs of weight to the harness. Once the dog is all hooked up, I throw the kong toy as far as I can. The dog sprints for all he's worth for the kong. I simply walk up to the dog, break him, and throw it again. He gets a little reward time every time he gets his mouth on the kong.