Place a random soccer ball (or multiple soccer balls) on the field. Each player should also have their own soccer ball. They should kick their soccer ball toward the other random one on the field, trying to hit it.
This will help them practice being more accurate with their kicks. If they hit the random ball, they should pick a new one on the field to aim towards.
Variation: If your kids are doing really well with this exercise, the coach could slowly roll a ball in front of a few kids and see if they can hit the moving ball with their own.
Variation #2: Place the random ball in front of the net and see if they can hit the random ball with their own, to create a score.