One kid in the middle and everyone else around in a circle. The kids pass the ball across the circle and play keep away. If the player in the middle steals it they return to the circle and the passer moves to the middle.

Simple cone drills are good too. A lot of good suggestions already in the thread. The biggest thing to teach kids that age is to dribble and control the ball as much as you can expect (not very much) for a kindergartener.