A tag game that will wear your kids out!! Make really big boundaries.
One person is "it." This person has to chase the others. When he tags someone, that person must lay down with both hands and feet sticking straight up, like a dead ant (because everyone knows that's what dead ants look like). In order for the dead ant to come alive, four people must tag one limb each.
Once someone has been a dead ant three times (this is on the honor system), they are now "it". It's always possible to have multiple people being "it" and makes it crazier when you don't know who to run from!