The following ten costumes are taken from the book Illegally Easy™ Halloween Costumes for Kids

two of the 76 main costumes in the book (click here to preview some more of the costumes, or scroll down for free last-minute costumes):

Ghost

Ninja

eight of the 24 last-minute solutions

Party cracker	Flower children	Doctor	Misfit
Snips	Stock Broker	Martian	Lady