I know these have been around a lot lately on the internet, but I love them so I had to make one to share with you. To make the wreath, I bought a foam tube at Home Depot that is in the plumbing section for 97 cents. I then cut the tube to the size that I wanted and then used duct tape to keep the two ends together. The one issue I ran into by doing this method was that it didn't stay a perfect circle. I've also heard of doing the same thing using a swim noodle. I just didn't want to spend $5 on a foam wreath when I could get away with only spending $1.
Next, I wrapped the wreath with black duct tape. Then I hot glued candy corns onto the wreath. Just a warning, this will take you a while haha. I changed the direction the candy corns were facing each row. Then I wanted to make my wreath a little different than all of the other candy corn wreaths out there, so I added a little sign that says "Trick or Treat" on it. I purchased a really thin piece of wood at Robert's for $1.80 or so. It was way longer than I wanted, but it was the right thickness and width. I broke the wood so it would have rough edges. I then outlined Trick or Treat on wood and painted around the words. I decided that I liked the plain wood look for the letters rather than painting them in a different color. I sanded down the sign a little bit so it would have a distressed/scary look to it. Then all I had to do was tie a ribbon to the top so I could hang it. I've seen where people have used a really thick ribbon to hang their wreath, which I think looks nice, but I didn't think it would look as good because of my sign.
I have talked to a few people who made these last year and their wreaths actually ended up melting! So you may want to preserve your wreath.