Here is another fast, no cost Halloween craft. I used a cloth diaper (I had them laying around-they are great dusting rags) but other materials such as cheese cloth or old sheet would work too.
Step 1: mix 1 cup cold water and 1/4 cup corn starch in a small sauce pan.
Step 2: bring to boil and stir until a thick jelly-like paste forms.
Step 3: soak cloth in water and squeeze out excess water (the water will help the cloth to absorb the starch)
Step 4: in a bowl add the starch solution and cloth, cover cloth well with starch solution and remove excess
Step 5: lay fabric over object to shape (I used a vase with a bowl turned upside down) and allow to dry over night
Step 6: add on face with paint or permanent marker.