Don't forget to look up articles on the internet to see if you have the items in your home to make a really cool Halloween costume.
A couple of years ago, I made a Headless Woman Halloween Costume. It was probably one of the best costumes I have ever had... and I made it homemade, out items from around the house.
The dress was an old one someone left in a rental property. The blood was made from corn starch and a couple of other items. Read the article to get a better idea.