A Nerf ball or a crumpled piece of paper is tossed from one player to another, and whoever drops the ball sits down. The last person standing is the winner. It's a good rainy day, game and nobody gets hurt, and hopefully nothing gets broken. Divide the group into two teams on opposite sides of the gym, as if for regular dodgeball. Students may throw, kick, or roll the ball over, or use their imaginations if they can think of another way.
Teams score a point each time their ball hits the wall behind the opposing team.
So the children are simultaneously trying to score points by hitting the other team's back wall while blocking balls to protect their own wall. Demarcate the playing area with a garden hose or other divider, with one team on each side. Teams may not cross the divider during play. Gather as many balls as possible and split them between the two teams to start. All at once, players throw the balls at the other team, trying to hit their opponents below the waist.