Fill up full size balloons with water. They can easily be a foot in length and get pretty heavy. Divide into as many teams as you want. The game is a relay. With a broom you have to push the water balloon across part of the parking lot and turn around and push back. It the balloon pops you must start over. It’s hilarious when some people go slow and others try to shoot it like a hockey puck and it explodes on them.
Alternative – Use small balloons for quicker games, younger kids, and less water.