I love the idea of you being the "mad scientist project". What a hoot!
I didn't do anything last year - this year I'm going "over the top" with matching dog and people costumes for my friend Liza and her Rosie and me and my Lacie. We are going to be Woodland Sprites complete with tutus and light up wings. I am in the middle of making the people tutus today. Liza and I are both a bit chunky so we should look absolutely disgusting in our tutus