I never use props of any kind (e.g. costumes, red noses, funny hats…) in my Laughter Yoga sessions as those tend to keep people anchored in their critical mind. I see more value in empowering people to feel good about themselves as they are, without having to use anything else.
Having said that there are times when I do use props in the context of special events because these can be tremendously entertaining. The only request though is that people have make up their own “costume” or “embellishment” with everyday items that they already have (that way nobody has to spend any money).
Here is an example of what people come up with when asked to be creative with toilet paper. It is awesome!
The images above are from http://www.zefrank.com/giveaway2/index.html