Halloween spider decoration super easy and inexpensive= crepe paper and balloon. I added a smaller balloon (same type- just less air in it) for a head. next year I'm gonna add a red X made from crepe paper on it's butt.
DIY Halloween decor ideas :: Use a white stocking with stuffing inside and add more spiders to the bottom then around. You could also put a glow stick in a water balloon and have it look like they're surrounding a glowing egg sack.