Rules: NO CC, Do NOT add/change the current walls on the outside. NO basements/extra rooms away from the build. You CAN add roofs, foundation, platforms, half walls/the flat square tool to create balconies etc. You can add walls INSIDE the build. You can rotate the shell. One expansion, one game pack and one stuff pack of your choice #xsweetbabyangelshellchallenge #xsweetbabyangel #shellchallenge #challenge #shell #20x20 #build #buildchallenge