What's a dollhouse without a few unmentionables hanging around on the bed or drying out in the shower stall.  I have seen many variations of the mini bra, but here's what I came up with:

For the bra straps I used small ribbon and cut it lengthwise so it was about the right width for a 1" scale doll (using a doll as a guide).  Then I cut out two triangles out of an old silk nightie.  I wet it a little and used a small bead to form rounded cups.  I glued a small piece of lace under each triangle to jazz it up a little.  Then I added a little rectangle for the clasp