LEGO CREATOR Model #31010. TREEHOUSE. 356 piece set. Ages 7 - 12 years . 3-in-1 Model builds rebuilds into a lakeside hut or farmyard barn Create your very own treetop hideaway with the LEGO Creator Tree House . Open the secret trapdoor and climb up the fold-down ladder. Use the gray bucket to lift supplies up with the winch. Fill the red bucket with water and tow it up to keep unwanted guests away.