This is one of the first games we teach in Puppy Kindergarten and it's a very important one. The puppy is NOT supposed to go directly to the hand with the treat. He is supposed to deliberately pick the empty hand....nudge it, lick it or paw it. The whole concept is teaching the puppy to do something else (work) for the reward...not try to take the treat directly. It's called Indirect Access and is a key concept to training.