Easiest way to make a person-sculpture?

I want to make a sculpture about the media's influence on young girls. As such, for one part of the project, I wish to make a rough model of a life-sized X-year old girl. (somewhere between 3 and 7) What materials would best be used easiest and most quickly?

My only idea so far includes using chicken wire/ plain old wire as a base, stuffing it with paper or stuffing of some sort, and coating it in plaster strips.

My goal is not realism, but just a basic.... model. base. to demonstrate/symbolize a very highly generic young girl.
 
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