Here is a site called "Got Free Cards" that allows your students to make Christmas cards (or any type of card for that matter). It is simple to use. Students can add a photo or image to the card. Students can add stickers to their card and change the text. They can choose fonts and colors. Printing out the cards is also easy. I chose single sided.
We plan to use this site to create and send Christmas cards to our friends and family.
I think your students would enjoy using "Got Free Cards".