public class Chico extends Thread {

	Caja caja ;
	
public Chico(Caja caja) {

	this.caja = caja ;
}
public void run() {
	
      caja.agregarJuguete(caja) ;
	
	try {                                                                       
	  Thread.sleep(1000);
	}
	catch (InterruptedException excp) {
	  throw new Error("Interrupted exception");
	}

	caja.agregarJuguete(caja) ;

}
}