I would go with some of these:
Alien
Ghost
Demon
Future Person
weird squid alien.
The costume for Davros, a character from Doctor Who, was designed by Peter McKinstry. His design includes the iconic chair that Davros sits in, along with his cybernetic enhancements.
a theme that is repeated within a single work of literature.
Draw a sun and a moon and tape them to shirts...
why was the bravery in the number the stars book in the first theme
Astrobiology
Costume ideas can be found at Costume Supercenter or Anytime Costumes. Alternatively, one could search Google Images for the theme that one wished to dress as for inspiration.
Costume ideas that begin with the letter i:Incredible HulkIndianIndiana JonesInmate
Halloween Costume Ideas for Men Women and Kids. Pumpkin carving tips, Safety tips, Sexy couples Ideas, Halloween Foods http://halloween-costume-ideas-2013.blogspot.com/
It depends on what kind of party it is. If it is a pajama party, wear your pajamas, if its is a pool party, you can wear your swimsuit. Halloween parties? Wear you r scariest Halloween costume. ^_^Depends on the theme once you find out the theme Google costume ideas or look on Pinterest
http://www.halloween.com/halloween-costume-quick-ideas.php
An Uncle Sam constume for the purpose of the fourth of July is the best theme costume for July.
You can get good 80's costume ideas on the following site: http://liketotally80s.com/80s-party-idea.html. They have great ideas!
a monkey
You can get some creative costume ideas at http://costumeideazone.com/. You can also get some ideas at http://www.indigo.org/halloween/page2.html
If you want costume ideas then the best place for that would be online on some Halloween websites. You can also just go to a website that has Audrey Hepburn costume ideas on their as well.
well its a bit obvious! Angel and devil are good or if not then look on the internet for costume ideas or look in costume shops
Family Fun Magazine offers some great Halloween costume ideas. They offer individual costume ideas or ideas you can use for the whole family! http://familyfun.go.com/crafts/ducks-662521/