First you need to buy or make your muneca. Old clothes and newspaper will do just fine.
You need to get a mask as your muneca will need a face.
You could write your testament of the last year or humorous wills or even photos.
You put them out in front so all can see. They can be of your friends, famous people, or a member of your family.
or even the whole family!!!
Maybe the dog?
A quick one that was put together at my Spanish school.
And what do they do with these dummies???