Operation Christmas Child is a project by Samaratin's Purse that sends shoe boxes filled with small items to needy children all over the world for Christmas. It's a great cause, and doesn't have to be anything expensive. Go here to find Instructions on sending a shoe box
It's somewhat short notice, as they're due from November 18-25. The website has a link where you can find a place to take yours.
Personal note: I had so much fun picking out stuff for mine! I'm doing one for a 2-4 year old girl. I got her a tiara and wand and beaded necklace from left over Halloween stuff, plus alot of other stuff. I will be using a pretty big box.