Define a playing area. Throw a ball in the air calling out someone’s name. Everyone else runs from the ball. “IT” gets the ball, calls “freeze”, and then rolls it at someone. If a person is hit then they have a letter. If no one is hit then the roller has a letter. The person who got a letter picks up the ball and throws it. You can throw the ball slightly in one direction, but give the thrower a letter if it goes so far as to roll out of the defined area.