In our neighborhood, kids trick-or-treat on the Sunday afternoon closest to Halloween. Our house is ready!
A few yards of black wool, a pair of scissors, and some masking tape and you've got yourself a poison spider farm.
Make a few black pompoms (I wind the yarn around the palm of my hand about 20 times), tie off the pompom with about a 2-ft. piece of yarn. Masking tape holds the "spider" by the front door and allows them to float in the breeze.