I started working on a firebox yesterday and finished bricking it today using egg carton bricks cut 5/32" tall by 3/4" wide.  This is about all I can show you of the work I did this past week during my minifest vacation.  I got a lot accomplished this week off from work.  :D

Here it is after painting, sealing and grouting.  I'll add some soot shading later on.

Egg carton bricks are just about my favorite trash-to-treasure material.  I used them on the Newport foundation.

click image to enlarge

And, I used them to make the study and living room fireplaces in the Newport.

Those are Greenleaf vinyl tiles on the outside and hearth here.

So, now you know I have a fireplace in the Spring Fling build.  Hmm...I hope I haven't given too much away.