Still looking for help with Lincoln Log type things.....

My Buddy's father passed away recently.  We found these in his stuff.  We're
guessing due to his age - these are likely from the Mid 30's.  They are like
Lincoln logs, but not quite.  They're round or Half round instead of square.
Even come with a Porcelain Toilet & Sink setup. Here's a pic of some of the
Pieces. There are many more....Perhaps in the original, however pretty beat
box.
Including an unused decal sheet.  (sticky stuff is no longer sticky)  :}

I'm just trying to find out what they are now - any help would be greatly
appreciated!!  I can of course provide more pictures if needed.
Thanks for your help.

Click for large pic:
http://home.nycap.rr.com/tdubrey/MysteryLogs.jpg

Thanks!
Todd