Rumbling Gold Mine Run is a Take-n-Play set. Play set is a fold-out playset featuring a Sodor Mining Co. gold mine. This is an incomplete set it is the playset only and does not include any of the extra pieces. Press on the red tower and the “gold” inside the bridge “pops” up and down. Set the track up with the lever under the gold mine and the mine door pops open when a train rolls over that track. This is a great set even without the extra pieces!