I have a 16 month old boy who is pretty bonkers. Very energetic and great fun. Shows a reasonable amount of understanding and has a few words. But he is like the terminator when it comes to other children, he runs at high speed and knocks them down, he doesn't think twice about poking them in the face with his finger and he will bite me if he is agitated or when I try to discipline him. I go to his eye level and give him a firm "no" and distract him with something else to do. But it doesn't seem to deter him. Any suggestions?