This build-em-up, knock-em-down game will get kids moving fast as they throw soft balls to knock down their opponents' towers. A rummage through your recycling bins should turn up plenty of stackables for the towers.
Number of players: 2 or more
To set up: Gather a large number of light, stackable items to use as blocks, and five soft objects per player for cannonballs. Each player creates a large circle, about 6 feet in diameter, with rope on grass or chalk on blacktop (make the circles close together for younger kids and farther apart for older kids). Divide the tower blocks equally. Players build their towers in the center of their circles.
To play: At "Go," players have two minutes to knock down other towers with their cannonballs, while remaining within their own circle. They can defend their towers by blocking the cannonballs thrown at them; if one lands in their circle, they may use it. If a player runs out of balls, he may leave his circle to collect others. If a tower falls, the player may rebuild it — just keep an eye on incoming balls! When time is up, the player with the tallest tower standing wins.