How to Make Costume Horns :: this is an overly complicated tutorial. I just used that stuff you use to vent your dryer. It already has the bumps an can be held in shape with duct tape.(How To Make Dress Duct Tape)
Cheesecloth Spirits cheese cloth dipped in liquid starch laid over a Styrofoam head. After it dried I popped it off and poof. i had a face. I hung them in the trees with strobes lights flashing on them. They looked so cool.