"Turn this weird shell into anything you want! It can be a house, a bar, a park... anything! The rules are simple: do not touch my walls. Turn this box into something cool, but don''t change any of the existing walls. You can add foundations, roofs, windows, paint, floorplans, etc. but you MUST NOT TOUCH MY WALLS. Literally anything else is fine. Just leave my walls alone. Post it with #DecemberSimsieShell when you''re done :)" I did the SHELL Challeng!! Hopefully you like it too! :p