Laser Tag
Laser tag lets kids "battle it out" in a real life scenario. Divide the kids into two separate groups and ask them to decide on a leader. Give them time to think about their war strategy and how they̵7;re going to win the laser tag game. You can use at-home laser tag equipment or you can go to a laser tag facility, which will be more involved and realistic. Most laser tag facilities are affordable for groups and will help you facilitate the game.
Capture the Flag
Find a field or large gymnasium to play capture the flag. Split the group of kids into two separate teams. Give each team a different color flag and a marker. Instruct the kids to decorate their flag specifically for their team. They can come up with a team name and symbol to include on the flag. Have the team meet in the middle of the field. Create a line in the middle of the playing field with one team on one side and the other team on the other side. Take the flags and switch them between the two teams. Each team hides the other team̵7;s flag. The objective is for each team of kids to find their flag and successfully get it over the center dividing line.
Water Balloon War
During warm weather, kids love to play water balloon war. Divide the children into two teams and give them a base that they have to defend. Give each team an equal number of water balloons to use when defending their base. If a child is hit with a water balloon that bursts, he is out of the game. The first team to touch the other team's base with two hands wins.
In the Line of Fire
Take the basic idea of dodge ball and add a war twist. Develop a story that the teams are on the front lines of a war and they need to attack the other team until one team is left standing. Start the game out with one ball and then randomly add one ball at a time to add a complicated element to the game. When a child is hit with a ball from the opposing team, they are dead. There's only a winner when all the players of one team are dead.