Made with trash bags! This cheap and easy Halloween craft looks awesome draping in a window or on a wall, or even hanging outside on the porch. You could also add some spooky spiders! If you’re looking for cheap and easy Halloween decorations to make, these DIY trash bag spiderwebs are perfect for hanging just about anywhere in your house. I made a step by step tutorial with lots of pictures. It's way easier than you think! Plus, you can make two spiderwebs at once because each one is made with just one side of a black trash bag.