you can us modeling clay or news paper with clay stuff on top.
Do a little research and buildi suggest styrophone
It depends where you live. A model typically earns $36,420 in the United States. This makes it lower paid than most sales workers.
There made in Serbia and assembled in America, do know that.
ermmm....cardboard , paper mache etc.. Go onto ehow.com it gives your tips! You should decide a scale then go and build!