Book Character Halloween Costume: If You Give a Mouse a Cookie. Have the cookie be the trick or treat bag. Or have a younger sibling be the cookie! DIY Halloween costumes DIY kids costumes (Halloween Costumes For Teachers)
Halloween costumes for girls - I work with special needs kids and love this Cinderella's Coach Costume! I know just the little girl that would LOVE this. Disney's Family Fun website has some awesome ideas for just about everything kid related!