Who said pizza and tag don't go together? Assign one person as the "chef" to be the tagger and to stand in the middle of the gym. Divvy the rest of the class into three equal groups of "toppings" (ex: cheese, pepperoni, onion). Have all the toppings line up on one side of the gym, and when the chef calls out one of the toppings, that set of players runs across the gym trying not to get tagged. If they get tagged, they must sit out. When the chef yells, "Open the oven!" then all players can join back in the game and new round starts.