One of my adult children's friends has a Halloween party every year. All good Catholic adult kids (if you know what I mean), they all loved this costume of Mike's pictured below.
Do you know what he is? A Confessional. It's a box covered with brown fabric. The square opening is covered with several layers of regular window screen. On the side he had wired a red and green light. When he was talking to someone he would turn on the red light. If he was free "to talk" he'd turn on the green light. When he was dancing he'd alternate the red and green lights to the rhythm of the music.
He won first prize. I thought it was hilarious. LOL