An interesting read from the December 1937 issue of Popular Mechanics Magazine about E.M. Aronson who made many walkaround props for circus clown Lew Hershey.
The article goes into good detail of how Aronson built each prop, if you'd like to make them yourselves, but I don't think they are worth the effort today. Maybe they were a laugh riot in 1937?
Unfortunately there is a Chinese laundry walkaround that has not aged well at all. What's more unfortunate, it was performed as late as 1989 on the Red and Gold Units of Ringling. Woof.
Enjoy!