Our pal Snooty from Snooty Sims has found a few new concept pictures of objects and test programs used for building The Sims 3. 

If you head on over to their Sims 3 Art Pics page, you will see 4 object drawings and 5 program concepts.  Remember, The Sims 3 has been in development for quite some time, so they have been through many concepts.  However, it is unusual to see pictures their tools, programs and prototypes as Maxis generally likes to keep that kind of stuff to themselves.

 Oh, and SimTimes has a new concept picture of the Science Building in The Sims 3.