Screws

Five, four, three, two, one A little screw went for a run And now without this little part Everything just falls apart If you think a screw is nothin' Take 'it out but just beware Everything will break without 'em With no little screws in there The bulldozer was a strong one Until there was a thud And then the mighty giant Fell straight into the mud The mighty crane was working Until there was a pop And then the mighty giant Gave out and lost its top.