Have all the kids with a ball at one end. Their job is to dribble inside the square to the other end. Start with the coach or other person in the middle. They are to try and kick the ball out of the area. If a person loses their ball, they help in the middle.
Play starts on a go command, so there is a big wave of people trying to get across.
Brian Whitney Safe Block Tackling Let me add the importance of teaching safe block tackling. When I first used this at practice the results were great. Now they are being cheered for getting out of the way. Our next game went well. You must repeat this often or they will revert back, but not so often that they become bored.