As inspired by gloriousbattle
here, I went to wal-marx and found the rubber-ball spiders he mentioned. They were amazingly cool, so I got some.
Materials:
-Spiderballs
-Those ear probe things from the doctor
-tinfoil
-Legs from a Reaper Miniatures spider-demon (thus disqualifying me from the Dollar-Store part of the contest if we were having said contest)

I'm not satisfied with them. What do they need?