The Baby Play-Mat I made and uploaded back in August of 2005 has always annoyed me in-game because of a shading issue that I didn't at the time know how to fix.
This is what it looked like originally, with the shading problem in full force:
These days I fix the mesh problem that was causing that particular error as I make new objects, and I decided it was time to pull up the old mesh file for this object and fix it too! Now the playmat looks nice and smoothly shaded, like this:
The fixed version has been posted and is now
available for download.