Halloween?

So my child is all set for Halloween, and so is my husband. Sweet LJ thinks all 3 of us should wear costumes. Most of the parents in our neighborhood dress up to take their kids trick-or-treating. Any costume ideas for me? Here are my criteria: I don't really like to dress up, so nothing ridiculous, and I don't like spending money on costumes, so nothing expensive.

We'll probably go to some thrift stores this weekend hunting for cheap inspiration. Initially, I wanted us to be a family of ninjas, but then I decided that Mary Lawton is too cute for that. She has an adorable costume--I'll probably post pictures from her Halloween photo shoot tomorrow.