The Spurting Spider
Mix batter according to package instructions. Bake it in two metal bowls - one bigger than the other. Once unmolded, cut the bigger cake (the body) in half, horizontally. Carefully scoop out the cavity in each half. Fill with well-whipped, set green JELL-O, and reattach the halves. Frost it black and arrange on a serving platter, adding the legs and eyes. When the cake is cut into, it will ooze green guts - just like a real spider!
Add a red-frosting hourglass on top to make a black widow spider, or mix brown frosting and shredded coconut to make a tarantula.