Welcome to the shell challenge!! The things that you are allowed to alter in this home consists of adding walls inside, Replace roofing, paint the exterior, removing/adding stairs, and adding doors and windows. The things you are not allowed to mess with are the walls of the EXTERIOR of the home, adding/removing decks, and adding/removing roofs. Make this home to whatever style preference and also furnish the home, too. Have fun! Tag #lexytennis1 #challenge or #shellchallenge #shell