Your students will love playing cowboy rodeo, a dress-up version of tag. Depending on your class size, one to two kids can dress up as cowboys while the rest of the class dresses as different animals (horses, sheep, pigs, cows, etc.). The cowboys then chase/tag the animals and send them all back to the designated pen. This continues until everyone has had a turn being a cowboy.
Dressing up as pirates and searching for treasure is a fun activity for preschoolers. In addition to pirate dress-up clothes, you will need a large piece of butcher paper, a treasure chest, and the treasure. On the butcher paper draw a clear and easy to read picture map of your classroom. Mark an x where you have hidden your "pirate treasure." Possible "treasure" items include chocolate gold coins, stickers and small toys. Have your class of pirates search for the treasure while teaching and encouraging them to use the big map to find it.
Kids will love dressing up like knights, princesses and wizards while playing the Camelot version of musical chairs. Break out the art supplies and have your kids color their own pre-cut (preferably with cardboard or poster-board) horse head. While they are creating their horse heads you can read aloud the story of King Arthur. Attach the horse heads to the back of chairs and encourage the children to pretend the chairs are horses. Have the kids stand near the chairs. Start the music, and begin the musical chairs game, taking away a "horse" each round until you are down to your last student. The last student is the king or queen of the classroom for the day.
This game can help preschoolers learn their colors. With your preschoolers decked out in khaki clothes, straw hats, binoculars and/or safari animals take them on a safari scavenger hunt. Prior to the game make a poster for each color you are going to search for and place the posters on different tables around the room. To start the game announce what color each child is going to search for on your safari, and then take your kids around the room and outside encouraging them to find something that is their chosen color. Once back in your classroom ask each student to show what they found and have them place it on the table with their color poster. This continues until all your posters have an item.