So fun! Head over to Best Buy and  get  the LEGO – Super Mario Reznor Knockdown Expansion Set on sale for only $34.99 Shipped! (Reg. $70) This has really Great Reviews! Make the LEGO Super Mario universe extra exciting for kids with this Reznor Knockdown Expansion Set (71390). It features buildable rotating platforms that spin by turning LEGO Mario and/or LEGO Luigi (figures not included) on the connected stand.