Some are even animated GIFs . . . ¡Lindo!
Many of the above images are not culturally relevant and they can give you an opportunity to discuss the differences in how the holiday is celebrated in the Spanish-speaking and the English-speaking worlds. My students are always surprised to learn that snow, Santa, stockings, candy canes, and presents are not traditionally part of the Hispanic celebration of Navidad. (Though things are changing as time marches on . . . no hay remedio.)
It might be a fun activity to get them to design their own graphic with imagery that is more relevant to the Hispanic holiday . . . maybe with an image of the three kings, Christmas tamales (yum!), poinsettias, or a piñata. Educational and entertaining! (And, of course, it would be a good opportunity to explain again why a guy in a big hat leaning against a cactus would not be a good choice.)
Just a note, I do not own the copyright to any of the above images. They were found online and I'm just putting them here so they can be made available for educational purposes.