Hens and Chicks
This game is all about corralling your little chickadees in a fun and fast version of tag. Designate two points approximately 25 to 35 feet apart as "safe spots." All of the chicks start at one of the two safe spots, and one hen starts between the two points. When the hen calls for her chicks to come home, all of the chicks try to run from one safe spot to the other. Then, the hen tries to catch her chicks, and any who are caught must join the hen in the center for the next round. The last chick standing becomes the hen for the next game.
Rock Paper Scissors Baseball
Set up four objects in a baseball diamond configuration. Split your kids into two separate teams, lining both teams up at home base. When you say "go," the first player from each team begins walking heel to toe around the bases in opposite directions as quickly as possible. Wherever the two players meet, they face off with a quick game of rock-paper-scissors. The winning player continues walking around the bases, and the losing player runs home as quickly as possible. When the losing player reaches home, the next player on his team may start walking the bases to head off the progressing player. This continues until one team has made it all the way around the bases a set number of times.
Use two large jumpropes to create a circle in the grass. Place 10 to 20 playground balls in the center of the circle. Have all the kids stand about 10 feet outside of the circle and take turns rolling a large basketball into the circle, trying to knock the playground balls out of the circle without the basketball following suit. If a player succeeds, she gets to keep the balls she knocked out and rolls again. When all of the balls have been knocked out of the circle, the player who collected the most balls wins the game.
Grab & Tag
If you're looking for a fun outdoor game for two kids to play, set up two bases about 40 feet apart for a quick game of grab and tag. Have the kids each start on a base and place a ball between them in the grass or sand. When you say "go," each player runs toward the ball, grabbing it and running back to his own base, or chasing the player with the ball, trying to tag him before he makes it home. The player who successfully makes it home or tags his opponent wins a point. The first player to five wins the game.