Split the class in half. Set up two cones on opposite ends of the gym, using the gym lines as boundaries. These are the jails. The object of the game is to tag another player that is "older" (not in age) than another. The "fresher" a player is, the less likely they can be tagged. If a player gets tagged by a fresher player, then they go to the other team's jail. When a player leaves jail they are "fresh" and have a lesser chance of getting tagged. This continues for several rounds.