To listen to French Christmas carols

http://sites.csdraveurs.qc.ca/musique/noel/

To read a story

Pierre et Monsieur Bonhomme de neige

To play games etc

http://www.vivenoel.com/

To find out all about Christmas in France

http://www.euroclubschools.co.uk/page41.htm

and an advent calendar for classes too.

http://www.jeannedelalune.co.uk/advent/Advent_Calendar_French.html

More sites on this SCILT page.