I Need Ideas For A Pre-Teen Halloween Party?

To make things interesting- I would tell everyone that it has to be a homemade costume that they wear-NOT store bought. That will make you guys think a bit about getting a good costume together. I would check with the library or the theater department at school and see if the have any good sound effects records or tapes- if not you can make your own. (chains clanking on a table, moaning, screeching, dogs barking, etc...) You can have someone older come in and teach you the dance moves to the THRILLER song. Make sure you buy several disposable camera and ask several people to take pictures throughout the evening.