"Grab a small dead mouse (aka hopper or fuzzy) with the hemostats just behind the head. Then grab the hatchling Ball Python just behind the head with your thumb and forefinger. GENTLY use the nose/face of the rodent to open the snake's mouth. Usually once the mouse's head is in the snake's mouth, a feeding response will kick in and the snake will start to swallow the mouse once you set the snake down. I do NOT force the mouse down the snakes throat! This can cause injury to the snake, and is not advisable. It's been my experience that given time, the right conditions, and patience, Ball Pythons will eventually eat."
http://www.kingsnake.com/ballpythonguide/#FEEDING