Take your class outside to have a scavenger hunt. When you say, "Go," the children will have to run around and find a leaf, a small twig and rock. The first player to find all three items and bring them back to you wins the game. Be sure to mark off a play area and tell the preschoolers to stay in that area so you can see them for safety reasons. Award a small prize to the winner.
Have your preschoolers help you put up a tent and fill it with several balls. Divide the preschoolers into even teams and mark a starting line about 20 feet from the tent. The students will line up at the starting line. When you yell, "Go," the first player in each team's line will run to the tent and get a ball. He will bring the ball to his next teammate in line. That person will take the ball back to the tent and grab another ball. Keep this rotation until everyone has a chance to run to the tent and get a ball. The first team to have all their players back wins the game.
Draw a picture of a bear's face on a large poster board and tape to the bottom of a cardboard box. Cut out the mouth (large enough for beanbags) and lean the box up against a wall. Give three beanbags to every child and tell them to try to "feed" the bear. For every beanbag a child gets in the bear's mouth, she earns a small prize. Beanbags are available at most retail stores or you can make your own using socks, rubber bands and rice. For added interest, use acrylic paint to paint the beanbags to resemble food.
Cut out several "rocks" from gray construction paper and scatter them all over the floor. Put out one less rock than you have preschoolers and play music. Tell the preschoolers to walk around the rocks while the music plays. When the music stops, the players have to jump on a rock. The preschooler left without a rock is out of the game. Remove a rock and keep playing. The last player standing on a rock wins the game.