Game: Waiter, there's a Head in my Soup!

Form two lines (this is a relay).  Beforehand, give each child their own paper plate and a balloon that they have drawn a face on.  Play Halloween music in the background.  At "go" the first person at the head of the line has to walk to a designated point holding his "balloon head" waiter style on his paper plate.  This isn't that easy to do because the balloons want to blow off.  So, if they do, they have to finish the rest of the race walking backwards.  When they get back to their starting point, the next person continues.  The first team to finish wins.

Mummy wrap!

This is played in several teams of two people.  Each two person team is given a roll of toilet paper (cheap will do, but be careful because it breaks easily).  At "go" one person wraps the other "mummy style" starting at the feet and working his way up to the head.  When the "mummy" is wrapped, he has to hop to a designated point, turn around and hop back.  The first to finish wins.  Then you plan it again with the other person being wrapped.

Scary Musical Chairs

Just the traditional game only using "Monster Mash" for the music.  You can also do "Cooperative Musical Chairs."  Instead of taking one chair and one person out each time, you take out one chair and leave all the children in and they have to sit on somebody's lap.  You eventually end up with one chair and about ten children sitting on it.  They really enjoy doing this!

Other Activities

Have someone paint faces.

Have a fortune teller tell fortunes by lighting up a lava lamp.  Only good fortunes of course.

Mad Scientist's Laboratory

Food to serve

Freeze Kool-Aid in surgical gloves and float the "hands" ice in your punch (break off the glove first). 

Fill surgical gloves with popcorn, bur first put a candy corn in the tips of the finger for the nail.  Tie closed. 

Make "Bat Brew" by filling 7-up and grape juice in a punch bowl and putting in scoops of green sherbet.  This looks awful when the sherbet starts to melt but even the parents go back for seconds because it tastes so yummy.  Serve it with a gummy worm hanging off the side of the cup.
 
Decorate a sheet cake like a graveyard.  (Version 1, Version 2)  Use crackers or cookies for tombstones.  Use black food coloring to make the icing a gray color. 

Make orange popcorn balls.

Decorate your serving table with fall leaves over a Halloween table cloth or even a piece of Halloween fabric.  I even draped orange lights (like Christmas lights) around the food.
 

Serve Oreo cookies with orange filling.

Serve cupcakes decorated for Halloween, better yet, bake the cupcakes in ice cream cones.  Be careful not to fill the cones too high or they will overflow.