My kids made adobes with luminarias on them. We just got a paper bag stuffed it with newspaper, stapled it closed and turned it sideways to make a home. The kids put luminarias on top of the house with yellow construction paper and made a path on side walks. They came out really cute!
We also made hand poinsettas with the background green and red hands on the inside. You can glue the hands to a circle to help make the hands stay together.