Shell Challenge! Rules: DO NOT move or buldoze external walls. DO NOT bulldoze existing stairs, you can add railings and more stairs. You can change the fence in the balcony but it must have one. You can delete all windows and place any windows you want. You can replace the main door but not change its position. You can build all the internal walls you want. You can decorate however you want. You can build external structures, like a greenhouse, pool or gazebo. #shell #shellchallenge #decoration