For halloweeen this year, I decided to make a lego man. I saw an instructable online http://www.instructables.com/id/LEGO-Man-Costume/
I looked up a lego image and started to build it. I spent around 20 hours to make my costume, and maybe $100.
Then I wore it to the transparent Iron Chef Party. It was salad, sandwich, dessert with a sweet of choice.
The most imaginative costume I saw was Jenny’s “inflatable air dancer”. She used the mesh crawling tunnels (that pull out to be 5 feet long for babies), and had anna sew a giant yellow cloth over it and give her two holes for the arm. They she did the dance for us, looked realistic.