Scary Pictionary
Divide children into two teams. Have players take turns drawing pictures which represent scary words, phrases and movie titles while the others try to guess what the pictures represent. Give plastic spider rings to the team with the most correct guesses.
Mummies on Parade
Divide children into two teams. Each team chooses one player to be the "mummy," and then the rest of the team uses toilet paper to create the scariest mummy possible. The team that creates the most authentic mummy wins. Purchase rubber snakes and insects from your local dollar store to give out as prizes. For some extra fun, put on spooky music and have the mummies parade around the room.
Mad Scientist's Lab
Have children gather in the kitchen and tell them that it is a mad scientist's lab. Divide the children into small groups. Give them bowls of "ingredients" that a mad scientist might use - peeled grapes are eyeballs, cooked spaghetti noodles drizzled with oil are intestines, flour is bone dust, peanut butter is ear wax, ketchup is blood, candy corn are crows' beaks and beaten eggs with green food coloring are "ogre boogers." Have children choose ingredients and mix them together. Bake all the creations and give loot bags of candy as prizes for the best and worst in both taste and appearance.
Freaky Freeze Dance
Have children stand up and space themselves out around the room. Turn the lights low, put on a CD of spooky graveyard sounds and have the children dance. When you turn the lights back on, any child still dancing is "out." Give a package of monster stickers to the last child remaining.
Zombie Tag
Make one child the "zombie" and tell the others they have to run from him or he will turn them into zombies. When a child is touched by a zombie, he turns into one and begins to chase the remaining children. Give a bouncy rubber eyeball to the last remaining "human" child.