I made a spider cake today:

(click for larger picture)
I used a bunt pan and four cupcakes then frosted, and made a spider web on top.I frosted the spiders and made little dot's with a cake icing baster.Then i put eye's on them with gel frosting, i used gumballs on one for the eyes and made another have fangs using butterscotch chips.For the spider leg's i heated chocolate chips in a frying pan then threw in chow mein noodles, mixed them then put them on foil to harden.I then stuck some in each side of the spiders.