public void enter(MinersSon son){
		  //if the miner is not already located at the goldmine, he must
		  //change location to the gold mine
		  if (son.getLocation() != Location.backyard)
		  {
		    System.out.println(son.getName() + " LET'S PLAY SOME BALL!");
		    son.changeLocation(Location.backyard);
		  }
	  }