This craft is cute for your Halloween porch and even very young children can make help with these.  

All you need is one white poster board and some small pieces of white crepe paper and a sharpie.  I bought the paper at Dollar Tree and made two with it.  I also used a small part of my white crepe paper that I will be using more later.  Here are the instructions:
Cut the poster board into two pieces and draw faces on them with a Sharpie.  I’m sure there are tons of ghost faces online to inspire you.
Then hot glue them into cylinders and using Elmer’s glue or tape, attach the crepe paper strips inside the cylinder to finish!  Kids would have so much fun helping decorate for all of their friends.  
Check back all week as I decorate my front porch for trick or treating using only Dollar Tree items.