DIY Outdoor Halloween Decorations: Spider Egg Sack ~ Spiders are always creepy, and are underused. Creep the kids out with this blooming baby spider sacks. Stuff a white stocking with cotton or stuffing to create the egg sack, and then adorn it with spiders for a finished look. The spiders should stick to it easily with the cotton and/or stocking. To make it a bit scarier, hang a few spiders off of the egg sacks (with thread or floss), so the kids will be touched by them as they walk through.