NIB w/ MI Explore new adventures with the LEGO Super Mario Luigi's Mansion Expansion Set (71401). This 877 piece set is for ages 8+ & features 4 different sections connected by a rotating hallway, 3 hidden gems, & includes 4 unique characters. A starter course (71360 or 71387) is required for the full experience as this is ONLY the expansion set. This set is brand new & has never been opened. However, there is some slight cosmetic damage on the box (featured in photos). Besides this, there are no other issues.