How can I make speres for an indoor 4 ft lighted snowman?

Ok, I think I need to rephrase my question. I am wanting to make a snowman to stand beside my Christmas tree. I saw it on t.v. the other night and they didn't give any instructions to make it. I know the spheres were made with chicken wire then covered with "batting" or "poly-fill. There were lights on the inside of it as well. I can't figure out how to make the chicken wire frames for the spheres (round for the body) so they are round. Does anyone have an idea?