An Allen Iverson crossover requires mainly leg and waist strength. But it also requires a ball handling skills to properly do an effective crossover move. One basic technique is to dribble the ball using your finger tips. Some kids use their palm that is why it is harder for them to control the ball. Using finger tips in dribbling means more ball control. Spread your fingers around the ball, relax your wrist every dribble, that is why it is good to have a proper stretching of arms before a game.